Document:

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                                                                   EXHIBIT 10.18

                                 NETMANAGE, INC.

                       1999 NONSTATUTORY STOCK OPTION PLAN

Purposes of the Plan. The purposes of this Nonstatutory Stock Option Plan are:

            -     to attract and retain the best available personnel for
                  positions of substantial responsibility,

            -     to provide additional incentive to Employees and Consultants,
                  and

            -     to promote the success of the Company's business.

      Options granted under the Plan will be Nonstatutory Stock Options.

Definitions.  As used herein, the following definitions shall apply:

      "Administrator" means the Board or any of its Committees as shall be
      administering the Plan, in accordance with Section 4 of the Plan.

      "Applicable Laws" means the requirements relating to the administration of
      stock option plans under U.S. state corporate laws, U.S. federal and state
      securities laws, the Code, any stock exchange or quotation system on which
      the Common Stock is listed or quoted and the applicable laws of any
      foreign country or jurisdiction where Options are, or will be, granted
      under the Plan.

      "Board" means the Board of Directors of the Company.

      "Code" means the Internal Revenue Code of 1986, as amended.

      "Committee" means a committee of Directors appointed by the Board in
      accordance with Section 4 of the Plan.

      "Common Stock" means the Common Stock of the Company.

      "Company" means NetManage, Inc.

      "Consultant" means any person, including an advisor, engaged by the
      Company or a Parent or Subsidiary to render services to such entity.

      "Director" means a member of the Board.

      "Disability" means total and permanent disability as defined in Section
      22(e)(3) of the Code.

      "Employee" means any person, including Officers, employed by the Company
      or any Parent or Subsidiary of the Company. A Service Provider shall not
      cease to be an Employee in the case of (i) any leave of absence approved
      by the Company or (ii) transfers between locations of the Company or
      between the Company, its Parent, any Subsidiary, or any successor. Neither
      service as a Director nor payment of a director's fee by the Company shall
      be sufficient to constitute "employment" by the Company.

      "Exchange Act" means the Securities Exchange Act of 1934, as amended.

      "Fair Market Value" means, as of any date, the value of Common Stock
      determined as follows:

If the Common Stock is listed on any established stock exchange or a national
market system, including without limitation the Nasdaq National Market or The
Nasdaq SmallCap Market of The Nasdaq Stock Market, its Fair Market Value shall
be the closing sales price for such stock (or the closing bid, if no sales were
reported) as quoted on such exchange or system on the date of determination, as
reported in The Wall Street Journal or such other source as the Administrator
deems reliable;

If the Common Stock is regularly quoted by a recognized securities dealer but
selling prices are not reported, the Fair Market Value of a Share of Common
Stock shall be the mean between the high bid and low asked prices for the Common
Stock on the date of determination, as reported in The Wall Street Journal or
such other source as the Administrator deems reliable;

In the absence of an established market for the Common Stock, the Fair Market
Value shall be determined in good faith by the Administrator.

      "Notice of Grant" means a written or electronic notice evidencing certain
      terms and conditions of an individual Option grant. The Notice of Grant is
      part of the Option Agreement.

      "Officer" means a person who is an officer of the Company within the
      meaning of Nasdaq guidelines, including all employees with the corporate
      rank of vice-president or higher, and employees with lesser rank but
      comparable authority.

      "Option" means a nonstatutory stock option granted pursuant to the Plan,
      that is not intended to qualify as an incentive stock option within the
      meaning of Section 422 of the Code and the regulations promulgated
      thereunder.

      "Option Agreement" means an agreement between the Company and an Optionee
      evidencing the terms and conditions of an individual Option grant. The
      Option Agreement is subject to the terms and conditions of the Plan.

      "Optioned Stock" means the Common Stock subject to an Option.

      "Optionee" means the holder of an outstanding Option granted under the
      Plan.

      "Parent" means a "parent corporation," whether now or hereafter existing,
      as defined in Section 424(e) of the Code.

      "Plan" means this 1999 Nonstatutory Stock Option Plan.

      "Service Provider" means an Employee, Consultant or Director.

      "Share" means a share of the Common Stock, as adjusted in accordance with
      Section 12 of the Plan.

      "Subsidiary" means a "subsidiary corporation," whether now or hereafter
      existing, as defined in Section 424(f) of the Code.

Stock Subject to the Plan. Subject to the provisions of Section 12 of the Plan,
the maximum aggregate number of Shares which may be optioned and sold under the
Plan is four million (4,000,000) Shares. The Shares may be authorized, but
unissued, or reacquired Common Stock.

      If an Option expires or becomes unexercisable without having been
exercised in full, the unpurchased Shares which were subject thereto shall
become available for future grant or sale under the Plan (unless the Plan has
terminated).

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Administration of the Plan.

Administration.  The Plan shall be administered by (i) the Board or (ii) a
Committee, which Committee shall be constituted to satisfy Applicable
Laws.

Powers of the Administrator. Subject to the provisions of the Plan, and in the
case of a Committee, subject to the specific duties delegated by the Board to
such Committee, the Administrator shall have the authority, in its discretion:

      to determine the Fair Market Value of the Common Stock;

      to select the Service Providers to whom Options may be granted hereunder;

      to determine whether and to what extent Options are granted hereunder;

      to determine the number of shares of Common Stock to be covered by each
      Option granted hereunder;

      to approve forms of agreement for use under the Plan, including the
      ability to approve forms of agreement allowing for early exercise of stock
      options prior to vesting, subject to the Optionee entering into a form of
      restricted stock purchase agreement;

      to determine the terms and conditions, not inconsistent with the terms of
      the Plan, of any award granted hereunder. Such terms and conditions
      include, but are not limited to, the exercise price, the time or times
      when Options may be exercised (which may be based on performance
      criteria), any vesting acceleration or waiver of forfeiture restrictions,
      and any restriction or limitation regarding any Option or the shares of
      Common Stock relating thereto, based in each case on such factors as the
      Administrator, in its sole discretion, shall determine;

      to construe and interpret the terms of the Plan and awards granted
      pursuant to the Plan;

      to prescribe, amend and rescind rules and regulations relating to the
      Plan, including rules and regulations relating to sub-plans established
      for the purpose of qualifying for preferred tax treatment under foreign
      tax laws;

      to modify or amend each Option (subject to Section 14(b) of the Plan),
      including the discretionary authority to extend the post-termination
      exercisability period of Options longer than is otherwise provided for in
      the Plan;

      to authorize any person to execute on behalf of the Company any instrument
      required to effect the grant of an Option previously granted by the
      Administrator;

      to determine the terms and restrictions applicable to Options;

      to allow Optionees to satisfy withholding tax obligations by electing to
      have the Company withhold from the Shares to be issued upon exercise of an
      Option that number of Shares having a Fair Market Value equal to the
      amount required to be withheld (but not more than the amount required to
      be withheld). The Fair Market Value of the Shares to be withheld shall be
      determined on the date that the amount of tax to be withheld is to be
      determined. All elections by an Optionee to have Shares withheld for this
      purpose shall be made in such form and under such conditions as the
      Administrator may deem necessary or advisable; and

      to make all other determinations deemed necessary or advisable for
      administering the Plan.

Effect of Administrator's Decision. The Administrator's decisions,
determinations and interpretations shall be final and binding on all Optionees
and any other holders of Options.

Eligibility. Options may be granted to Service Providers; provided, however,
that Options may not be granted to Officers and Directors, except as an
essential inducement to an Officer entering into an employment agreement
regarding his or her initial service with the Company.

Limitation. Neither the Plan nor any Option shall confer upon an Optionee any
right with respect to continuing the Optionee's relationship as a Service
Provider with the Company, nor shall they interfere in any way with the
Optionee's right or the Company's right to terminate such relationship at any
time, with or without cause.

Term of Plan. The Plan shall become effective upon its adoption by the Board. It
shall continue in effect for ten (10) years, unless sooner terminated under
Section 14 of the Plan.

Term of Option.  The term of each Option shall be stated in the Option
Agreement.

Option Exercise Price and Consideration.

Exercise Price.  The per share exercise price for the Shares to be issued
pursuant to exercise of an Option shall be determined by the Administrator.

Waiting Period and Exercise Dates. At the time an Option is granted, the
Administrator shall fix the period within which the Option may be exercised and
shall determine any conditions which must be satisfied before the Option may be
exercised.

Form of Consideration.  The Administrator shall determine the acceptable
form of consideration for exercising an Option, including the method of
payment.  Such consideration may consist entirely of:

      cash;

      check;

      promissory note;

      other Shares which (A) in the case of Shares acquired upon exercise of an
      option, have been owned by the Optionee for more than six months on the
      date of surrender, and (B) have a Fair Market Value on the date of
      surrender equal to the aggregate exercise price of the Shares as to which
      said Option shall be exercised;

      consideration received by the Company under a cashless exercise program
      implemented by the Company in connection with the Plan;

      such other consideration and method of payment for the issuance of Shares
      to the extent permitted by Applicable Laws; or

      any combination of the foregoing methods of payment.

Exercise of Option.

Procedure for Exercise; Rights as a Shareholder. Any Option granted hereunder
shall be exercisable according to the terms of the Plan and at such times and
under such conditions as determined by the Administrator and set forth in the
Option Agreement. An Option may not be exercised for a fraction of a Share.

      An Option shall be deemed exercised when the Company receives: (i) written
or electronic notice of exercise (in accordance with the Option Agreement) from
the person entitled to exercise the Option, and (ii) full payment for the Shares
with respect to which the Option is exercised. Full payment may consist of any
consideration and method of payment authorized by the Administrator and
permitted by the Option Agreement and the Plan. Shares issued upon exercise of
an Option shall be issued in the name of the Optionee or, if requested by the
Optionee, in the name of the Optionee and his or her spouse. Until the Shares
are issued (as evidenced by the appropriate entry on the books of the Company or
of a duly authorized transfer agent of the Company), no right to vote or receive
dividends or any other rights as a shareholder shall exist with respect to the
Optioned Stock, notwithstanding the exercise of the Option. The Company shall
issue (or cause to be issued) such Shares promptly after the Option is
exercised. No adjustment will be made for a dividend or other right for which
the record date is prior to the date the Shares are issued, except as provided
in Section 12 of the Plan.

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      Exercising an Option in any manner shall decrease the number of Shares
thereafter available, both for purposes of the Plan and for sale under the
Option, by the number of Shares as to which the Option is exercised.

Termination of Relationship as a Service Provider. If an Optionee ceases to be a
Service Provider, other than upon the Optionee's death or Disability, the
Optionee may exercise his or her Option, but only within such period of time as
is specified in the Option Agreement, and only to the extent that the Option is
vested on the date of termination (but in no event later than the expiration of
the term of such Option as set forth in the Option Agreement). In the absence of
a specified time in the Option Agreement, the Option shall remain exercisable
for three (3) months following the Optionee's termination. If, on the date of
termination, the Optionee is not vested as to his or her entire Option, the
Shares covered by the unvested portion of the Option shall revert to the Plan.
If, after termination, the Optionee does not exercise his or her Option within
the time specified by the Administrator, the Option shall terminate, and the
Shares covered by such Option shall revert to the Plan.

Disability of Optionee. If an Optionee ceases to be a Service Provider as a
result of the Optionee's Disability, the Optionee may exercise his or her Option
within such period of time as is specified in the Option Agreement, to the
extent the Option is vested on the date of termination (but in no event later
than the expiration of the term of such Option as set forth in the Option
Agreement). In the absence of a specified time in the Option Agreement, the
Option shall remain exercisable for twelve (12) months following the Optionee's
termination. If, on the date of termination, the Optionee is not vested as to
his or her entire Option, the Shares covered by the unvested portion of the
Option shall revert to the Plan. If, after termination, the Optionee does not
exercise his or her Option within the time specified herein, the Option shall
terminate, and the Shares covered by such Option shall revert to the Plan.

Death of Optionee. If an Optionee dies while a Service Provider, the Option may
be exercised within such period of time as is specified in the Option Agreement
(but in no event later than the expiration of the term of such Option as set
forth in the Notice of Grant), by the Optionee's estate or by a person who
acquires the right to exercise the Option by bequest or inheritance, but only to
the extent that the Option is vested on the date of death. In the absence of a
specified time in the Option Agreement, the Option shall remain exercisable for
twelve (12) months following the Optionee's termination. If, at the time of
death, the Optionee is not vested as to his or her entire Option, the Shares
covered by the unvested portion of the Option shall immediately revert to the
Plan. The Option may be exercised by the executor or administrator of the
Optionee's estate or, if none, by the person(s) entitled to exercise the Option
under the Optionee's will or the laws of descent or distribution. If the Option
is not so exercised within the time specified herein, the Option shall
terminate, and the Shares covered by such Option shall revert to the Plan.

Buyout Provisions. The Administrator may at any time offer to buy out for a
payment in cash or Shares, an Option previously granted based on such terms and
conditions as the Administrator shall establish and communicate to the Optionee
at the time that such offer is made.

Non-Transferability of Options. Unless determined otherwise by the
Administrator, an Option may not be sold, pledged, assigned, hypothecated,
transferred, or disposed of in any manner other than by will or by the laws of
descent or distribution and may be exercised, during the lifetime of the
Optionee, only by the Optionee. If the Administrator makes an Option
transferable, such Option shall contain such additional terms and conditions as
the Administrator deems appropriate.

Adjustments Upon Changes in Capitalization, Dissolution, Merger, Asset
Sale or Corporate Reorganization.

Changes in Capitalization. Subject to any required action by the shareholders of
the Company, the number of shares of Common Stock covered by each outstanding
Option, and the number of shares of Common Stock which have been authorized for
issuance under the Plan but as to which no Options have yet been granted or
which have been returned to the Plan upon cancellation or expiration of an
Option, as well as the price per share of Common Stock covered by each such
outstanding Option, shall be proportionately adjusted for any increase or
decrease in the number of issued shares of Common Stock resulting from a stock
split, reverse stock split, stock dividend, combination or reclassification of
the Common Stock, or any other increase or decrease in the number of issued
shares of Common Stock effected without receipt of consideration by the Company;
provided, however, that conversion of any convertible securities of the Company
shall not be deemed to have been "effected without receipt of consideration."
Such adjustment shall be made by the Board, whose determination in that respect
shall be final, binding and conclusive. Except as expressly provided herein, no
issuance by the Company of shares of stock of any class, or securities
convertible into shares of stock of any class, shall affect, and no adjustment
by reason thereof shall be made with respect to, the number or price of shares
of Common Stock subject to an Option.

Dissolution or Liquidation. In the event of the proposed dissolution or
liquidation of the Company, the Administrator shall notify each Optionee as soon
as practicable prior to the effective date of such proposed transaction. The
Administrator in its discretion may provide for an Optionee to have the right to
exercise his or her Option until ten (10) days prior to such transaction as to
all of the Optioned Stock covered thereby, including Shares as to which the
Option would not otherwise be exercisable. In addition, the Administrator may
provide that any Company repurchase option applicable to any Shares purchased
upon exercise of an Option shall lapse as to all such Shares, provided the
proposed dissolution or liquidation takes place at the time and in the manner
contemplated. To the extent it has not been previously exercised, an Option will
terminate immediately prior to the consummation of such proposed action.

Merger, Asset Sale or Corporate Reorganization. In the event of: (1) a merger or
consolidation in which the Company is not the surviving corporation; (2) a
reverse merger in which the Company is the surviving corporation but the shares
of the Company's common stock outstanding immediately preceding the merger are
converted by virtue of the merger into other property, whether in the form of
securities, cash or otherwise; or (3) any other capital reorganization in which
more than fifty percent (50%) of the shares of the Company entitled to vote are
exchanged (other than pursuant to a transaction effected solely for the purpose
of changing the situs of the Company's incorporation, e.g. from California to
Delaware), then to the extent permitted by applicable law the Options and any
restricted stock subject thereto shall become 100% vested and exercisable for a
period of at least 10 days prior to the closing of such transaction, and such
Options shall be terminated if not exercised prior to the closing of such
transaction.

Date of Grant. The date of grant of an Option shall be, for all purposes, the
date on which the Administrator makes the determination granting such Option, or
such other later date as is determined by the Administrator. Notice of the
determination shall be provided to each Optionee within a reasonable time after
the date of such grant.

Amendment and Termination of the Plan.

Amendment and Termination.  The Board may at any time amend, alter,
suspend or terminate the Plan.

Effect of Amendment or Termination. No amendment, alteration, suspension or
termination of the Plan shall impair the rights of any Optionee, unless mutually
agreed otherwise between the Optionee and the Administrator, which agreement
must be in writing and signed by the Optionee and the Company. Termination of
the Plan shall not affect the Administrator's ability to exercise the powers
granted to it hereunder with respect to options granted under the Plan prior to
the date of such termination.

Conditions Upon Issuance of Shares.

Legal Compliance. Shares shall not be issued pursuant to the exercise of an
Option unless the exercise of such Option and the issuance and delivery of such
Shares shall comply with Applicable Laws and shall be further subject to the
approval of counsel for the Company with respect to such compliance.

Investment Representations. As a condition to the exercise of an Option the
Company may require the person exercising such Option to represent and warrant
at the time of any such exercise that the Shares are being purchased only for
investment and without any present intention to sell or distribute such Shares
if, in the opinion of counsel for the Company, such a representation is
required.

Inability to Obtain Authority. The inability of the Company to obtain authority
from any regulatory body having

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jurisdiction, which authority is deemed by the Company's counsel to be necessary
to the lawful issuance and sale of any Shares hereunder, shall relieve the
Company of any liability in respect of the failure to issue or sell such Shares
as to which such requisite authority shall not have been obtained.

Reservation of Shares. The Company, during the term of this Plan, will at all
times reserve and keep available such number of Shares as shall be sufficient to
satisfy the requirements of the Plan.

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                                 NETMANAGE, INC.

                       1999 NONSTATUTORY STOCK OPTION PLAN

                             STOCK OPTION AGREEMENT

Unless otherwise defined herein, the terms defined in the Plan shall have the
same defined meanings in this Option Agreement.

1. NOTICE OF STOCK OPTION GRANT

[Optionee's Name and Address]

You have been granted an option to purchase Common Stock of the Company, subject
to the terms and conditions of the Plan and this Option Agreement, as follows:

Grant Number                                ____________________________________
Date of Grant                               ____________________________________

Vesting Commencement Date                   ____________________________________
Exercise Price per Share                    $___________________________________
Total Number of Shares Granted              ____________________________________
Total Exercise Price                        $___________________________________
Type of Option:                             Nonstatutory Stock Option
Term/Expiration Date:                       ____________________________________
Vesting Schedule:                           ____________________________________

Subject to the Optionee continuing to be a Service Provider on such dates, this
Option shall vest and become exercisable in accordance with the following
schedule:

      25% of the Shares subject to the Option shall vest twelve months after the
Vesting Commencement Date, and 1/48th of the Shares subject to the Option shall
vest each full month thereafter, so as to be 100% vested and on the fourth
anniversary of the Vesting Commencement Date, subject to Optionee remaining a
Service Provider on such vesting dates.

Termination Period:

This Option may be exercised for three months after Optionee ceases to be a
Service Provider. Upon the death or Disability of the Optionee, this Option may
be exercised for twelve months following Optionee's termination as a Service
Provider. In no event shall this Option be exercised later than the
Term/Expiration Date as provided above.

2. AGREEMENT

      1. Grant of Option. The Plan Administrator of the Company hereby grants to
the Optionee named in the Notice of Grant attached as Part I of this Agreement
(the "Optionee") an option (the "Option") to purchase the number of Shares, as
set forth in the Notice of Grant, at the exercise price per share set forth in
the Notice of Grant (the "Exercise Price"), subject to the terms and conditions
of the Plan, which is incorporated herein by reference. Subject to Section 14(b)
of the Plan, in the event of a conflict between the terms and conditions of the
Plan and the terms and conditions of this Option Agreement, the terms and
conditions of the Plan shall prevail.

      2. Exercise of Option.

            (a) Right to Exercise. This Option is exercisable during its term in
accordance with the Vesting Schedule set out in the Notice of Grant and the
applicable provisions of the Plan and this Option Agreement.

<PAGE>   6
            (b) Method of Exercise. This Option is exercisable by delivery of an
exercise notice, in the form attached as Exhibit A (the "Exercise Notice"),
which shall state the election to exercise the Option, the number of Shares in
respect of which the Option is being exercised (the "Exercised Shares"), and
such other representations and agreements as may be required by the Company
pursuant to the provisions of the Plan. The Exercise Notice shall be completed
by the Optionee and delivered to Stock Option Administration. The Exercise
Notice shall be accompanied by payment of the aggregate Exercise Price as to all
Exercised Shares. This Option shall be deemed to be exercised upon receipt by
the Company of such fully executed Exercise Notice accompanied by such aggregate
Exercise Price.

               No Shares shall be issued pursuant to the exercise of this Option
unless such issuance and exercise complies with Applicable Laws. Assuming such
compliance, for income tax purposes the Exercised Shares shall be considered
transferred to the Optionee on the date the Option is exercised with respect to
such Exercised Shares.

      3. Method of Payment. Payment of the aggregate Exercise Price shall be by
any of the following, or a combination thereof, at the election of the Optionee:

            (a) cash;

            (b) check;

            (c) consideration received by the Company under a cashless exercise
program implemented by the Company in connection with the Plan; or

            (d) surrender of other Shares which (i) in the case of Shares
acquired upon exercise of an option, have been owned by the Optionee for more
than six (6) months on the date of surrender, and (ii) have a Fair Market Value
on the date of surrender equal to the aggregate Exercise Price of the Exercised
Shares.

      4. Non-Transferability of Option. This Option may not be transferred in
any manner otherwise than by will or by the laws of descent or distribution and
may be exercised during the lifetime of Optionee only by the Optionee. The terms
of the Plan and this Option Agreement shall be binding upon the executors,
administrators, heirs, successors and assigns of the Optionee.

      5. Term of Option. This Option may be exercised only within the term set
out in the Notice of Grant, and may be exercised during such term only in
accordance with the Plan and the terms of this Option Agreement.

      6. Tax Consequences. Some of the federal tax consequences relating to this
Option, as of the date of this Option, are set forth below. THIS SUMMARY IS
NECESSARILY INCOMPLETE, AND THE TAX LAWS AND REGULATIONS ARE SUBJECT TO CHANGE.
THE OPTIONEE SHOULD CONSULT A TAX ADVISER BEFORE EXERCISING THIS OPTION OR
DISPOSING OF THE SHARES.

            (a) Exercising the Option. The Optionee may incur regular federal
income tax liability upon exercise of an NSO. The Optionee will be treated as
having received compensation income (taxable at ordinary income tax rates) equal
to the excess, if any, of the Fair Market Value of the Exercised Shares on the
date of exercise over their aggregate Exercise Price. If

                                      -2-
<PAGE>   7
the Optionee is an Employee or a former Employee, the Company will be required
to withhold from his or her compensation or collect from Optionee and pay to the
applicable taxing authorities an amount in cash equal to a percentage of this
compensation income at the time of exercise, and may refuse to honor the
exercise and refuse to deliver Shares if such withholding amounts are not
delivered at the time of exercise.

(b) Disposition of Shares. If the Optionee holds NSO Shares for at least one
year, any gain realized on disposition of the Shares will be treated as
long-term capital gain for federal income tax purposes.

      7. Entire Agreement; Governing Law. The Plan is incorporated herein by
reference. The Plan and this Option Agreement constitute the entire agreement of
the parties with respect to the subject matter hereof and supersede in their
entirety all prior undertakings and agreements of the Company and Optionee with
respect to the subject matter hereof, and may not be modified adversely to the
Optionee's interest except by means of a writing signed by the Company and
Optionee. This agreement is governed by the internal substantive laws, but not
the choice of law rules, of California.

      8. NO GUARANTEE OF CONTINUED SERVICE. OPTIONEE ACKNOWLEDGES AND AGREES
THAT THE VESTING OF SHARES PURSUANT TO THE VESTING SCHEDULE HEREOF IS EARNED
ONLY BY CONTINUING AS A SERVICE PROVIDER AT THE WILL OF THE COMPANY (AND NOT
THROUGH THE ACT OF BEING HIRED, BEING GRANTED AN OPTION OR PURCHASING SHARES
HEREUNDER). OPTIONEE FURTHER ACKNOWLEDGES AND AGREES THAT THIS AGREEMENT, THE
TRANSACTIONS CONTEMPLATED HEREUNDER AND THE VESTING SCHEDULE SET FORTH HEREIN DO
NOT CONSTITUTE AN EXPRESS OR IMPLIED PROMISE OF CONTINUED ENGAGEMENT AS A
SERVICE PROVIDER FOR THE VESTING PERIOD, FOR ANY PERIOD, OR AT ALL, AND SHALL
NOT INTERFERE WITH OPTIONEE'S RIGHT OR THE COMPANY'S RIGHT TO TERMINATE
OPTIONEE'S RELATIONSHIP AS A SERVICE PROVIDER AT ANY TIME, WITH OR WITHOUT
CAUSE.

        By your signature and the signature of the Company's representative
below, you and the Company agree that this Option is granted under and governed
by the terms and conditions of the Plan and this Option Agreement. Optionee has
reviewed the Plan and this Option Agreement in their entirety, has had an
opportunity to obtain the advice of counsel prior to executing this Option
Agreement and fully understands all provisions of the Plan and Option Agreement.
Optionee hereby agrees to accept as binding, conclusive and final all decisions
or interpretations of the Administrator upon any questions relating to the Plan
and Option Agreement. Optionee further agrees to notify the Company upon any
change in the residence address indicated below.

OPTIONEE                                  NETMANAGE, INC.

----------------------------------        --------------------------------------
Signature                                 By

                                          President and CEO
----------------------------------        --------------------------------------
Print Name                                Title

                                      -3-
<PAGE>   8

----------------------------------
Residence Address

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                                      -4-
<PAGE>   9
                                    EXHIBIT A

                                 NETMANAGE, INC.

                       1999 NONSTATUTORY STOCK OPTION PLAN

                                 EXERCISE NOTICE

NetManage, Inc.
Attention: Stock Option Administration

      1. Exercise of Option. Effective as of today, ________________, _____, the
undersigned ("Purchaser") hereby elects to purchase ______________ shares (the
"Shares") of the Common Stock of NetManage, Inc. (the "Company") under and
pursuant to the 1999 Nonstatutory Stock Option Plan (the "Plan") and the Stock
Option Agreement dated, _________, ___ (the "Option Agreement"). The purchase
price for the Shares shall be $___, as required by the Option Agreement.

      2. Delivery of Payment. Purchaser herewith delivers to the Company the
full purchase price for the Shares.

      3. Representations of Purchaser. Purchaser acknowledges that Purchaser has
received, read and understood the Plan and the Option Agreement and agrees to
abide by and be bound by their terms and conditions.

      4. Rights as Shareholder. Until the issuance (as evidenced by the
appropriate entry on the books of the Company or of a duly authorized transfer
agent of the Company) of the Shares, no right to vote or receive dividends or
any other rights as a shareholder shall exist with respect to the Optioned
Stock, notwithstanding the exercise of the Option. The Shares so acquired shall
be issued to the Optionee as soon as practicable after exercise of the Option.
No adjustment will be made for a dividend or other right for which the record
date is prior to the date of issuance, except as provided in Section 12 of the
Plan.

      5. Tax Consultation. Purchaser understands that Purchaser may suffer
adverse tax consequences as a result of Purchaser's purchase or disposition of
the Shares. Purchaser represents that Purchaser has consulted with any tax
consultants Purchaser deems advisable in connection with the purchase or
disposition of the Shares and that Purchaser is not relying on the Company for
any tax advice.

      6. Entire Agreement; Governing Law. The Plan and Option Agreement are
incorporated herein by reference. This Agreement, the Plan and the Option
Agreement constitute the entire agreement of the parties with respect to the
subject matter hereof and supersede in their entirety all prior undertakings and
agreements of the Company and Purchaser with respect to the subject matter
hereof, and may not be modified adversely to the Purchaser's interest except by
means of a writing signed by the Company and Purchaser. This agreement is
governed by the internal substantive laws, but not the choice of law rules, of
California.

<PAGE>   10

Submitted by:                             Accepted by:

PURCHASER                                 NETMANAGE, INC.

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Signature                                 By

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Print Name                                Title

                                          --------------------------------------
                                          Date Received

Address:
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         -------------------------<PAGE>   1
                                                                   EXHIBIT 10.16

                              AMENDMENT NUMBER ONE

AMENDMENT NUMBER ONE TO THAT LEASE DATED NOVEMBER 23, 1998 BETWEEN SPIEKER
PROPERTIES, L.P., AS LANDLORD, AND POET SOFTWARE CORPORATION, AS TENANT (THE
"LEASE"), FOR PREMISED LOCATED AT 999 BAKER WAY, SAN MATEO, CALIFORNIA.

Effective approximately May 1, 2000, the Lease will be amended as follows to
provide for Tenant's expansion premises and extension of Lease term:

1.   PREMISES. The term "Premises" as used in the Lease is amended to mean
     approximately 12,118 square feet of rentable area located on the second
     floor of the building known as San Mateo Bay Center III. The Premises as
     expanded herein are approximately as shown outlined in red on the attached
     floor plan (Exhibit B - Suite 200). The square footage on the first floor
     shall be reduced to 0 square feet upon commencement of the 12,118 square
     feet on the second floor and pursuant to Paragraph 36.

2.   OCCUPANCY DENSITY. 3.2 people per 1000 square feet.

3.   RENT. Base Rent for the Premises as expanded herein shall be as follows:

     5/01/00 - 4/30/01   Forty thousand seven hundred sixteen dollars and
                         00/100ths dollars ($40,716.00) per month plus operating
                         expenses per Paragraph 7 of the Lease. Operating
                         expenses through December 2000 are estimated to be
                         $10,785.00 per month. Direct operating expenses are
                         estimated a year in advance and collected on a monthly
                         basis. Any adjustments necessary (up or down) will be
                         made at the end of the operating year.

     5/01/01 - 4/30/02   Forty one thousand nine hundred twenty eight dollars
                         and 00/100ths dollars ($41,928.00) per month plus
                         operating expenses per Paragraph 7 of the Lease.

     5/01/02 - 4/30/03   Forty three thousand one hundred forty dollars and
                         00/100ths dollars ($43,140.00) per month plus operating
                         expenses per Paragraph 7 of the Lease.

     5/01/03 - 4/30/04   Forty four thousand four hundred seventy three and
                         00/100ths dollars ($44,473.00) per month plus operating
                         expenses per Paragraph 7 of the Lease.

4.   SECURITY DEPOSIT. The Security Deposit under the Lease shall be increased
     by $29,973.00 for a total Security Deposit of $44,473.00, payable upon
     execution of this Amendment Number One. The sums shall be held and owned by
     Landlord in an interest bearing account and as further defined in Paragraph
     19 of the Lease. Landlord shall have the obligation to pay interest to
     Tenant on an annual basis upon the anniversary month of the Lease.

5.   TENANT'S PROPORTIONATE SHARE. 19.28%

6.   TENANT IMPROVEMENTS. Tenant agrees to accept the Premises as so expanded in
     "as is" condition except for the improvements as described on the attached
     Exhibit A.

7.   EARLY ACCESS. Tenant shall have access to the Premises (15) fifteen days
     prior to the Effective Date for the purposes of performing cabling, wiring
     or other communications related work. Tenant shall not reasonably interfere
     with, disturb or delay construction by Landlord.
<PAGE>   2
8.   RE-LEASING OF PREMISES. From and after the date of this Agreement,
     Landlord shall have full access to the existing premises on the ground
     floor at all times reasonable to Tenant and Landlord in order to show the
     premises to prospective tenants. Tenant agrees that Landlord may enter
     into a new lease for the existing premises with any third party prior to
     the Effective Date and that Tenant shall have no right to any amounts
     received by Landlord in connection therewith.

All other terms and conditions of the Lease shall remain in full force and
effect and shall apply to the Premises as well as to the original premises.

Dated: January 19, 2000

IN WITNESS WHEREOF, the premises hereto have executed this Amendment Number One
as of the day and year first above written.

LANDLORD:

SPIEKER PROPERTY, L.P.,
a California limited partnership

By: Spieker Properties, Inc.,
    a Maryland corporation,
    its general partner

    By:  /s/ NANCY GILLE
         --------------------------
         Nancy Gille

    Its: Vice President
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TENANT:

POET SOFTWARE CORPORATION.
a Massachusetts corporation

By: /s/  JERRY WONG
    --------------------------
    Jerry Wong

Its: Vice President of Finance
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<PAGE>   3
                                   EXHIBIT A

                          LEASE IMPROVEMENT AGREEMENT

1.   In consideration of the mutual covenants contained in the Lease of which
     this EXHIBIT A is a part, Landlord agrees to perform the following initial
     tenant improvement work in the Premises ("TENANT IMPROVEMENTS"):

               a)   steam clean carpets,

               b)   paint interior walls,

               c)   install a sink, lower cabinets and possibly a dishwasher in
                    a location mutually agreeable to Landlord and Tenant,

               d)   create an opening between two separate spaces in a location
                    mutually agreeable to Landlord and Tenant,

               e)   demolish necessary walls to create a conference room with
                    possibly some floor to ceiling glass in a location that
                    shall be determined by Tenant.

The cost to the Landlord for tenant improvement work described in items c, d and
e above shall not exceed $12,118.00.

     2.   All the Tenant Improvements described above shall be performed by
Landlord at its cost and expense using Building Standard materials and in the
Building Standard manner. As used herein, "Building Standard" shall mean the
standards for a particular item selected from time to time by Landlord for the
Building or such other standards as may be mutually agreed upon between Landlord
and Tenant in writing.

     3.   Without limiting the "as-is" provisions of the Lease, Tenant accepts
the Premises in its "as-is" condition and acknowledges that Landlord has no
obligation to make any changes or improvements to the Premises or to pay any
costs expended or to be expended in connection with any such changes or
improvements, other than the Tenant Improvements specified in Paragraph 1 of
this EXHIBIT A.

     4.   Tenant shall not perform any work in the Premises (including, without
limitation, cabling, wiring, fixturization, painting, carpeting, replacements or
repairs) except in accordance with Paragraphs 12 and 27 of the Lease. Landlord
shall not require prior written consent for cabling, wiring and other
communications related work resulting from the relocation to the second floor,
however, said work shall otherwise be performed in accordance with Paragraphs 12
and 27.

<PAGE>   4

                                   EXHIBIT B

                                  [FLOOR PLAN]

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