Document:

<PAGE>
                                                                     EXHIBIT 4.1

COMMON SHARES          COMMON SHARES

WRS

WINDROSE MEDICAL PROPERTIES TRUST

a Real Estate Investment Trust

FORMED UNDER THE LAWS OF THE STATE OF MARYLAND

SEE REVERSE FOR IMPORTANT NOTICE ON TRANSFER RESTRICTIONS AND OTHER INFORMATION

CUSIP 973491 10 3

THIS CERTIFIES THAT

is the owner of

FULLY PAID AND NONASSESSABLE COMMON SHARES OF BENEFICIAL INTEREST,
$.01 PAR VALUE PER SHARE, OF
WINDROSE MEDICAL PROPERTIES TRUST
(the "Trust"), transferable on the books of the Trust by the holder hereof in
person or by its duly authorized attorney upon surrender of this Certificate
properly endorsed. This Certificate and the shares represented hereby are issued
and shall be held subject to all of the provisions of the Declaration of Trust
and Bylaws of the Trust and any amendments thereto. This Certificate is not
valid unless countersigned and registered by the Transfer Agent and Registrar.

IN WITNESS WHEREOF, the Trust has caused this Certificate to be executed on its
behalf by its duly authorized officers.

DATED:

SECRETARY

PRESIDENT

COUNTERSIGNED AND REGISTERED:
CONTINENTAL STOCK TRANSFER & TRUST COMPANY
TRANSFER AGENT AND REGISTRAR
BY

AUTHORIZED OFFICER

<PAGE>
IMPORTANT NOTICE

The Trust will furnish to any shareholder, on request and without charge, a full
statement of the information required by Section 8-203(d) of the Corporations
and Associations Article of the Annotated Code of Maryland with respect to the
designations and any preferences, conversion and other rights, voting powers,
restrictions, limitations as to dividends and other distributions,
qualifications, and terms and conditions of redemption of the shares of each
class of beneficial interest which the Trust has authority to issue and, if the
Trust is authorized to issue any preferred or special class in series, (i) the
differences in the relative rights and preferences between the shares of each
series to the extent set, and (ii) the authority of the Board of Trustees to set
such rights and preferences of subsequent series. The foregoing summary does not
purport to be complete and is subject to and qualified in its entirety by
reference to the Declaration of Trust of the Trust, a copy of which will be sent
without charge to each shareholder who so requests. Such request must be made to
the Secretary of the Trust at its principal office or to the Transfer Agent.

The Trust will furnish a full statement about certain restrictions on
transferability to a shareholder on request and without charge. Such request
must be made to the Secretary of the Trust as its principal office or to the
Transfer Agent.

KEEP THIS CERTIFICATE IN A SAFE PLACE. IF IT IS LOST, STOLEN OR DESTROYED, THE
TRUST WILL REQUIRE A BOND OF INDEMNITY AS A CONDITION TO THE ISSUANCE OF A
REPLACEMENT CERTIFICATE.

The following abbreviations, when used in the inscription on the face of this
Certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

TEN COM -
TEN ENT -
JT TEN -

as tenants in common
as tenants by the entireties
as joint tenants with right
of survivorship and not as tenants
in common

UNIF GIFT MIN ACT-                    Custodian
                                                       (Cust)
(Minor)
                                 under Uniform Gifts to Minors Act

(State)

Additional abbreviations may also be used though not in the above list.

<PAGE>

For value received,
hereby sells, assigns and transfers unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
IDENTIFYING NUMBER OF ASSIGNEE

(PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

shares

of beneficial interest of the Trust represented by this Certificate and do
hereby irrevocably constitute and appoint

attorney

to transfer the said shares on the books of the Trust, with full power of
substitution in the premises.
Dated

NOTICE:

THE SIGNATURE TO THIS ASSIGNMENT MUST CORRESPOND WITH THE NAME AS WRITTEN UPON
THE FACE OF THIS CERTIFICATE IN EVERY PARTICULAR, WITHOUT ALTERATION OR
ENLARGEMENT OR ANY CHANGE WHATEVER.

Signature(s) Guaranteed

By

THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION
(BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH
MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM), PURSUANT TO
S.E.C. RULE 17Ad-15.Exhibit 10.1

                                VOTING AGREEMENT

     This Voting Agreement (this "Agreement") dated February 28, 2002 is entered
into among Artisoft, Inc., a Delaware corporation (the "Company"), and Special
Situations Fund III, L.P., Special Situations Cayman Fund, L.P., Special
Situations Private Equity Fund, L.P., Special Situations Technology Fund, L.P.,
Lagunitas Partners, LP, Gruber & McBaine International, Jon D. Gruber, F/B/O
Lindsay Deroy Gruber Trust dated December 27, 1976 and F/B/O Jonathan Wyatt
Gruber Trust dated December 30, 1975 (each individually, a "Stockholder"; and
collectively, the "Stockholders").

     In consideration of the mutual promises made herein and for other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto hereby agree as follows:

     1. CERTAIN DEFINITIONS.

          As used in this Agreement, the following terms shall have the
following meanings:

          "Common Stock" means the common stock, $0.01 par value per share, of
the Company.

          "Effective Date" means the date of this Agreement.

          "Excess Shares" means, with respect to any Stockholder at any time,
the shares of Preferred Stock constituting the difference obtained by
subtracting (i) the Voting Shares held by such Stockholder from (ii) the total
Preferred Shares held by such Stockholder. The number of Excess Shares held by
each Stockholder as of the date hereof is set forth on SCHEDULE SH appended
hereto.

          "Nasdaq" means the Nasdaq National Market or any successor thereto.

          "Purchase Agreement" means that certain Purchase Agreement dated as of
August 8, 2001 by and among the Company and the Stockholders.

          "Preferred Shares" means shares of Series B Convertible Preferred
Stock, $1.00 par value per share, of the Company. The number of Preferred Shares
held by each Stockholder as of the date hereof is set forth on SCHEDULE SH
appended hereto.

          "Voting Shares" means, with respect to any Stockholder at any time,
the Preferred Shares constituting the product (rounded off to the nearest whole
number, with fractional amounts equal to 0.50 rounded up) obtained by
<PAGE>
multiplying (i) the total Preferred Shares held by such Stockholder by (ii)
0.681. The number of Voting Shares held by each Stockholder as of the date
hereof is set forth on SCHEDULE SH appended hereto. The parties hereto
acknowledge and agree that any and all of the Stockholders may agree to deem any
number of Voting Shares held by any Stockholder party to such agreement to be
Excess Shares and an equal number of Excess Shares held by any Stockholder party
to such agreement to be Voting Shares; PROVIDED, THAT, the total number of
Voting Shares held by such Stockholders after such agreement does not exceed the
total number of Voting Shares held by such Stockholders prior to such agreement.
No such agreement shall be effective unless and until the Company has received
written notice (executed by all Stockholders party to such agreement) thereof.

     2. VOTING. Each Stockholder covenants and agrees that, from and after the
Effective Date and until the termination of this Agreement in accordance with
the terms hereof, at any meeting of stockholders of the Company, however called,
and in any action by written consent of stockholders of the Company, such
Stockholder will not vote, or cause to be voted (by means of proxy, voting
trust, voting agreement or otherwise), Preferred Shares other than the Voting
Shares held by such Stockholder on any matter on which the holders of Preferred
Shares vote together with the holders of the Common Stock (and any other class
or series of capital stock of the Company) as a single class. Notwithstanding
the foregoing, nothing in this Agreement shall restrict any Stockholder from
voting or causing to be voted at any meeting of stockholders of the Company or
in any action by written consent of stockholders of the Company (i) any
Preferred Shares (including, without limitation, any Excess Shares) on any
matter upon which the holders of Preferred Shares are voting as a separate
class, solely to the extent such holders of Preferred Shares are voting as a
separate class and (ii) any shares of Common Stock, whether acquired upon
conversion of Preferred Shares or otherwise. Any Excess Shares held by a
Stockholder and not voted pursuant to the provisions of this Section 2 (and any
Excess Shares voted in contravention of the provisions of this Section 2) shall
be deemed to be abstentions and shall be counted for purposes of determining
whether or not a quorum exists at any meeting of stockholders of the Company.

     3. TERM. This Agreement shall become effective on the Effective Date. This
Agreement shall terminate as to any Stockholder (i) upon receipt by the Company
of written notification from Nasdaq that the ownership and voting of the
Preferred Shares (including, without limitation, the Excess Shares) by the
Stockholders does not conflict with Nasdaq Marketplace Rule 4351 or any
successor thereto, (ii) upon the conversion of all Preferred Shares owned by
such Stockholder into Common Stock pursuant to the terms of the Preferred Shares
or (iii) upon such Stockholder no longer owning any Preferred Shares.

     4. LEGEND. Each certificate representing Preferred Shares held by a
Stockholder shall bear a legend substantially in the following form:

        "The securities represented by this certificate are subject to a
        voting agreement with the Corporation, a copy of which is
        available for inspection at the office of the Secretary of the
        Corporation."

                                      -2-
<PAGE>
Promptly following the execution of this Agreement, each Stockholder will return
to the Company any and all certificates representing shares held by such
Stockholder so that the Company may place thereon the legend required by this
Section 4. The legend required by this Section 4 shall be removed from
certificates representing Preferred Shares held by a Stockholder at the request
of such Stockholder, upon the termination of this Agreement and the delivery to
the Company of such certificates.

     5. NO REVOCATION. This Agreement shall be deemed to be coupled with an
interest and may not be revoked, except with the written consent of the Company.

     6. SUCCESSORS AND ASSIGNS. This Agreement shall inure to the benefit of the
successors and assigns of the Company and be binding upon the Stockholders and
each of their respective heirs, executors, administrators, successors and
assigns. Any sale or other transfer of any Preferred Shares shall be null and
void, unless and until the transferee agrees in a writing delivered to the
Company to be bound by the terms of this Agreement, which writing shall also
contain notice to the Company of such transfer and of the notice information for
such transferee.

     7. SPECIFIC PERFORMANCE. The parties hereto agree that irreparable damage
would occur in the event any provision of this Agreement were not performed in
accordance with the terms hereof. In the event of any breach of this Agreement,
in addition to any and all other remedies available at law, the parties hereto
shall be entitled to specific performance of this Agreement and to such other
injunctive or equitable remedy as may be granted by a court of competent
jurisdiction.

     8. NOTICES. All notices and other communications provided for or permitted
under this Agreement shall be made as set forth in Section 9.4 of the Purchase
Agreement.

     9. AMENDMENT. Any term of this Agreement may be amended and the observance
of any term of this Agreement may be waived (either generally or in a particular
instance and either retroactively or prospectively), only with the written
consent of the Company and the holders of at least 80% of the Preferred Shares
then subject to this Agreement. Any amendment of waiver effected in accordance
with this Section 9 shall be binding upon each holder of Preferred Shares, each
future holder of all such Preferred Shares and the Company.

     10. APPLICABLE LAW. This Agreement shall be governed by and construed in
accordance with, the laws of the State of Delaware without regard to principles
of conflicts of laws.

     11. SEVERABILITY. Any provision of this Agreement that is prohibited or
unenforecable in any jurisdiction shall, as to such jurisdiction, be ineffective
to the extent of such prohibition or unenforceability without invalidating the
remaining provisions hereof but shall be interpreted as if it were written so as
to be enforceable to the maximum extent permitted by applicable law, and any
such prohibition or unenforceability in any jurisdiction shall not invalidate or
render unenforceable such provision in any other jurisdiction. To the extent
permitted by applicable law, the parties hereto hereby waive any provision of
law which renders any provisions hereof prohibited or unenforceable in any
respect.

                                      -3-
<PAGE>
     12. COUNTERPARTS. This Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument. This Agreement may also
be executed via facsimile, which shall be deemed an original.

     13. ENTIRE AGREEMENT. This Agreement represents the complete agreement of
the parties hereto with respect to the subject matter hereof and supersedes all
prior agreements and understandings relating to the subject matter hereof.

     14. CONFLICTS. If there is any conflict between the terms of this Agreement
and the Purchase Agreement (or any agreement entered into pursuant to the
Purchase Agreement), the terms of this Agreement shall control.

     15. TITLES AND SUBTITLES. The titles and subtitles used in this Agreement
are used for convenience only and are not to be considered in construing or
interpreting this Agreement.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the date first above written.

                                    COMPANY:

                                    ARTISOFT, INC.

                                    By: /s/ Steven G. Manson
                                        ----------------------------------------
                                        Name: Steven G. Manson
                                        Title: President & CEO

                                    STOCKHOLDERS:

                                    SPECIAL SITUATIONS FUND III, L.P.

                                    By: /s/ Austin Marxe
                                        ----------------------------------------
                                        Name: Austin Marxe
                                        Title: General Partner

                                    SPECIAL SITUATIONS CAYMAN
                                    FUND, L.P.

                                    By: /s/ Austin Marxe
                                        ----------------------------------------
                                        Name: Austin Marxe
                                        Title: General Partner

                                      -4-
<PAGE>
                                                       STOCKHOLDERS (CONTINUED):

                                    SPECIAL SITUATIONS PRIVATE
                                    EQUITY FUND, L.P.

                                    By: /s/ Austin Marxe
                                        ----------------------------------------
                                        Name: Austin Marxe
                                        Title: General Partner

                                    SPECIAL SITUATIONS TECHNOLOGY
                                    FUND, L.P.

                                    By: /s/ Austin Marxe
                                        ----------------------------------------
                                        Name: Austin Marxe
                                        Title: General Partner

                                    LAGUNITAS PARTNERS, LP

                                    By: Gruber & McBaine Capital
                                          Management, LLC,
                                          its General Partner

                                    By: /s/ Jon D. Gruber
                                        ----------------------------------------
                                        Name: Jon D. Gruber
                                        Title: Managing Member

                                    GRUBER & MCBAINE
                                    INTERNATIONAL

                                    By: Gruber & McBaine Capital
                                        Management, LLC,
                                        Attorney-in-Fact

                                    By: /s/ Jon D. Gruber
                                        ----------------------------------------
                                        Name: Jon D. Gruber
                                        Title: Managing Member

                                      -5-
<PAGE>
                                                       STOCKHOLDERS (CONTINUED):

                                    JON D. GRUBER

                                    /s/ Jon D. Gruber
                                    --------------------------------------------
                                    Individually

                                    F/B/O LINDSAY DEROY GRUBER
                                    TRUST DATED DECEMBER 27, 1976

                                    By: /s/ Jon D. Gruber
                                        ----------------------------------------
                                        Name: Jon D. Gruber
                                        Title: Trustee

                                    F/B/O JONATHAN WYATT GRUBER
                                    TRUST DATED DECEMBER 30, 1975

                                    By: /s/ Jon D. Gruber
                                        ----------------------------------------
                                        Name: Jon D. Gruber
                                        Title: Trustee

                                      -6-
<PAGE>
                                   SCHEDULE SH

                PREFERRED SHARES, VOTING SHARES AND EXCESS SHARES

                                  Total Preferred    Total Voting   Total Excess
                                    Shares as of     Shares as of   Shares as of
                                    date of this     date of this   date of this
Stockholder                          Agreement        Agreement      Agreement
-----------                          ---------        ---------      ---------

Special Situations
  Fund III, L.P.                     1,140,000         776,340         363,660
Special Situations Cayman
  Fund, L.P.                           380,000         258,780         121,220
Special Situations Private
  Equity Fund, L.P.                    380,000         258,780         121,220
Special Situations
  Technology Fund, L.P.                200,000         136,200          63,800
Lagunitas Partners, LP                 448,000         305,088         142,912
Gruber & McBaine International         140,000          95,340          44,660
Jon D. Gruber                           80,000          54,480          25,520
F/B/O Lindsay Deroy
  Gruber Trust dated
  December 27, 1976                     16,000          10,896           5,104
F/B/O Jonathan Wyatt
  Gruber Trust dated
  December 30, 1975                     16,000          10,896           5,104
                                     ---------       ---------       ---------

TOTALS                               2,800,000       1,906,800         893,200

                                      SH-1

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00041-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00041-of-00352.parquet"}]]