Document:

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                                                                    EXHIBIT 10.5

                                 PROMISSORY NOTE

$15,000                                                  As of December 19, 2005

                                                         Burlington, MA

     Navitas International Corporation (the "Maker") promises to pay to the
order of S.P. Kothari (the "Payee") the principal sum of fifteen thousand
Dollars and No Cents ($15,000) in lawful money of the United States of America,
on the terms and conditions described below.

     1.   PRINCIPAL. The principal balance of this Note and all accrued interest
shall be repayable on the earlier of (i) December 19, 2006 or (ii) the date on
which Maker consummates an initial public offering of its securities.

     2.   INTEREST. Interest shall accrue on the outstanding, unpaid principal
balance of this Note at the rate of 3% per annum.

     3.   APPLICATION OF PAYMENTS. All payments shall be applied first to
payment in full of any costs incurred in the collection of any sum due under
this Note, including (without limitation) reasonable attorney's fees, then to
the payment in full of any late charges, then to accrued interest and finally to
the reduction of the unpaid principal balance of this Note.

     4.   EVENTS OF DEFAULT. The following shall constitute Events of Default:

          (a)  Failure to Make Required Payments. Failure by Maker to pay the
principal of this Note within five (5) business days following the date when
due.

          (b)  Voluntary Bankruptcy, Etc. The commencement by Maker of a
voluntary case under the Federal Bankruptcy Code, as now constituted or
hereafter amended, or any other applicable federal or state bankruptcy,
insolvency, reorganization, rehabilitation or other similar law, or the consent
by it to the appointment of or taking possession by a receiver, liquidator,
assignee, trustee, custodian, sequestrator (or other similar official) of Maker
or for any substantial part of its property, or the making by it of any
assignment for the benefit of creditors, or the failure of Maker generally to
pay its debts as such debts become due, or the taking of corporate action by
Maker in furtherance of any of the foregoing.

          (c)  Involuntary Bankruptcy, Etc. The entry of a decree or order for
relief by a court having jurisdiction in the premises in respect of Maker in an
involuntary case under the Federal Bankruptcy Code, as now or hereafter
constituted, or any other applicable federal or state bankruptcy, insolvency or
other similar law, or appointing a

<PAGE>
                                                                    EXHIBIT 10.5

receiver, liquidator, assignee, custodian, trustee, sequestrator (or similar
official) of maker or for any substantial part of its property, or ordering the
winding-up or liquidation of its affairs, and the continuance of any such decree
or order unstayed and in effect for a period of 60 consecutive days.

     5.   REMEDIES.

          (a)  Upon the occurrence of an Event of Default specified in Section
4(a), Payee may, by written notice to Maker, declare this Note to be due and
payable, whereupon the principal amount of this Note, and all other amounts
payable thereunder, shall become immediately due and payable without
presentment, demand, protest or other notice of any kind, all of which are
hereby expressly waived, anything contained herein or in the documents
evidencing the same to the contrary notwithstanding.

          (b)  Upon the occurrence of an Event of Default specified in Sections
4(b) and 4(c), the unpaid principal balance of, and all other sums payable with
regard to, this Note shall automatically and immediately become due and payable,
in all cases without any action on the part of Payee.

     6.   WAIVERS. Maker and all endorsers and guarantors of, and sureties for,
this Note waive presentment for payment, demand, notice of dishonor, protest,
and notice of protest with regard to the Note, all errors, defects and
imperfections in any proceedings instituted by Payee under the terms of this
Note, and all benefits that might accrue to Maker by virtue of any present or
future laws exempting any property, real or personal, or any part of the
proceeds arising from any sale of any such property, from attachment, levy or
sale under execution, or providing for any stay of execution, exemption from
civil process, or extension of time for payment; and Maker agrees that any real
estate that may be levied upon pursuant to a judgment obtained by virtue hereof,
on any writ of execution issued hereon, may be sold upon any such writ in whole
or in part in any order desired by Payee.

     7.   UNCONDITIONAL LIABILITY. Maker hereby waives all notices in connection
with the delivery, acceptance, performance, default, or enforcement of the
payment of this Note, and agrees that its liability shall be unconditional,
without regard to the liability of any other party, and shall not be affected in
any manner by any indulgence, extension of time, renewal, waiver or modification
granted or consented to by Payee, and consents to any and all extensions of
time, renewals, waivers, or modifications that may be granted by Payee with
respect to the payment or other provisions of this Note, and agree that
additional makers, endorsers, guarantors, or sureties may become parties hereto
without notice to them or affecting their liability hereunder.

     8.   NOTICES. Any notice called for hereunder shall be deemed properly
given if (i) sent by certified mail, return receipt requested, (ii) personally
delivered, (iii) dispatched by any form of private or governmental express mail
or delivery service providing receipted delivery or (iv) sent by telefacsimile
or (v) to the following addresses

<PAGE>
                                                                    EXHIBIT 10.5

or to such other address as either party may designate by notice in accordance
with this Section:

     If to Maker:

          Navitas International Corporation
          Attn: Parag G. Mehta
          4 Dublin Circle
          Burlington, MA 01803

     If to Payee:

          S.P. Kothari
          11 Walnut Street
          Lexington, MA 02421

     Notice shall be deemed given on the earlier of (i) actual receipt by the
receiving party, (ii) the date shown on a telefacsimile transmission
confirmation, (iii) the date reflected on a signed delivery receipt, or (iv) two
(2) Business Days following tender of delivery or dispatch by express mail or
delivery service.

     9.   CONSTRUCTION. THIS NOTE SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE
WITH THE DOMESTIC, INTERNAL LAW, BUT NOT THE LAW OF CONFLICT OF LAWS, OF THE
COMMONWEALTH OF MASSACHUSETTS.

     10.  SEVERABILITY. Any provision contained in this Note which is prohibited
or unenforceable in any jurisdiction shall, as to such jurisdiction, be
ineffective to the extent of such prohibition or unenforceability without
invalidating the remaining provisions hereof, and any such prohibition or
unenforceability in any jurisdiction shall not invalidate or render
unenforceable such provision in any other jurisdiction.

     IN WITNESS WHEREOF, Maker, intending to be legally bound hereby, has caused
this Note to be duly executed by its President the day and year first above
written.

                                               NAVITAS INTERNATIONAL CORPORATION

                                               By: /s/ Parag G. Mehta
                                                  ------------------------------
                                               Name: Parag G. Mehta
                                               Title: Chief Executive Officer<PAGE>
                                                                    EXHIBIT 10.6

                                 PROMISSORY NOTE

$15,000                                                  As of December 19, 2005

                                                         Burlington, MA

     Navitas International Corporation (the "Maker") promises to pay to the
order of Michael D. Marvin (the "Payee") the principal sum of fifteen thousand
Dollars and No Cents ($15,000) in lawful money of the United States of America,
on the terms and conditions described below.

     1.   PRINCIPAL. The principal balance of this Note and all accrued interest
shall be repayable on the earlier of (i) December 19, 2006 or (ii) the date on
which Maker consummates an initial public offering of its securities.

     2.   INTEREST. Interest shall accrue on the outstanding, unpaid principal
balance of this Note at the rate of 3% per annum.

     3.   APPLICATION OF PAYMENTS. All payments shall be applied first to
payment in full of any costs incurred in the collection of any sum due under
this Note, including (without limitation) reasonable attorney's fees, then to
the payment in full of any late charges, then to accrued interest and finally to
the reduction of the unpaid principal balance of this Note.

     4.   EVENTS OF DEFAULT. The following shall constitute Events of Default:

          (a)  Failure to Make Required Payments. Failure by Maker to pay the
principal of this Note within five (5) business days following the date when
due.

          (b)  Voluntary Bankruptcy, Etc. The commencement by Maker of a
voluntary case under the Federal Bankruptcy Code, as now constituted or
hereafter amended, or any other applicable federal or state bankruptcy,
insolvency, reorganization, rehabilitation or other similar law, or the consent
by it to the appointment of or taking possession by a receiver, liquidator,
assignee, trustee, custodian, sequestrator (or other similar official) of Maker
or for any substantial part of its property, or the making by it of any
assignment for the benefit of creditors, or the failure of Maker generally to
pay its debts as such debts become due, or the taking of corporate action by
Maker in furtherance of any of the foregoing.

          (c)  Involuntary Bankruptcy, Etc. The entry of a decree or order for
relief by a court having jurisdiction in the premises in respect of Maker in an
involuntary case under the Federal Bankruptcy Code, as now or hereafter
constituted, or any other applicable federal or state bankruptcy, insolvency or
other similar law, or appointing a

<PAGE>
                                                                    EXHIBIT 10.6

receiver, liquidator, assignee, custodian, trustee, sequestrator (or similar
official) of maker or for any substantial part of its property, or ordering the
winding-up or liquidation of its affairs, and the continuance of any such decree
or order unstayed and in effect for a period of 60 consecutive days.

     5.   REMEDIES.

          (a)  Upon the occurrence of an Event of Default specified in Section
4(a), Payee may, by written notice to Maker, declare this Note to be due and
payable, whereupon the principal amount of this Note, and all other amounts
payable thereunder, shall become immediately due and payable without
presentment, demand, protest or other notice of any kind, all of which are
hereby expressly waived, anything contained herein or in the documents
evidencing the same to the contrary notwithstanding.

          (b)  Upon the occurrence of an Event of Default specified in Sections
4(b) and 4(c), the unpaid principal balance of, and all other sums payable with
regard to, this Note shall automatically and immediately become due and payable,
in all cases without any action on the part of Payee.

     6.   WAIVERS. Maker and all endorsers and guarantors of, and sureties for,
this Note waive presentment for payment, demand, notice of dishonor, protest,
and notice of protest with regard to the Note, all errors, defects and
imperfections in any proceedings instituted by Payee under the terms of this
Note, and all benefits that might accrue to Maker by virtue of any present or
future laws exempting any property, real or personal, or any part of the
proceeds arising from any sale of any such property, from attachment, levy or
sale under execution, or providing for any stay of execution, exemption from
civil process, or extension of time for payment; and Maker agrees that any real
estate that may be levied upon pursuant to a judgment obtained by virtue hereof,
on any writ of execution issued hereon, may be sold upon any such writ in whole
or in part in any order desired by Payee.

     7.   UNCONDITIONAL LIABILITY. Maker hereby waives all notices in connection
with the delivery, acceptance, performance, default, or enforcement of the
payment of this Note, and agrees that its liability shall be unconditional,
without regard to the liability of any other party, and shall not be affected in
any manner by any indulgence, extension of time, renewal, waiver or modification
granted or consented to by Payee, and consents to any and all extensions of
time, renewals, waivers, or modifications that may be granted by Payee with
respect to the payment or other provisions of this Note, and agree that
additional makers, endorsers, guarantors, or sureties may become parties hereto
without notice to them or affecting their liability hereunder.

     8.   NOTICES. Any notice called for hereunder shall be deemed properly
given if (i) sent by certified mail, return receipt requested, (ii) personally
delivered, (iii) dispatched by any form of private or governmental express mail
or delivery service providing receipted delivery or (iv) sent by telefacsimile
or (v) to the following addresses

<PAGE>
                                                                    EXHIBIT 10.6

or to such other address as either party may designate by notice in accordance
with this Section:

     If to Maker:

          Navitas International Corporation
          Attn: Parag G. Mehta
          4 Dublin Circle
          Burlington, MA 01803

     If to Payee:

          Michael D. Marvin
          Chairman Emeritus
          MapInfo Corp.
          One Global View
          Troy, NY 12180

     Notice shall be deemed given on the earlier of (i) actual receipt by the
receiving party, (ii) the date shown on a telefacsimile transmission
confirmation, (iii) the date reflected on a signed delivery receipt, or (iv) two
(2) Business Days following tender of delivery or dispatch by express mail or
delivery service.

     9.   CONSTRUCTION. THIS NOTE SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE
WITH THE DOMESTIC, INTERNAL LAW, BUT NOT THE LAW OF CONFLICT OF LAWS, OF THE
COMMONWEALTH OF MASSACHUSETTS.

     10.  SEVERABILITY. Any provision contained in this Note which is prohibited
or unenforceable in any jurisdiction shall, as to such jurisdiction, be
ineffective to the extent of such prohibition or unenforceability without
invalidating the remaining provisions hereof, and any such prohibition or
unenforceability in any jurisdiction shall not invalidate or render
unenforceable such provision in any other jurisdiction.

     IN WITNESS WHEREOF, Maker, intending to be legally bound hereby, has caused
this Note to be duly executed by its President the day and year first above
written.

                                               NAVITAS INTERNATIONAL CORPORATION

                                               By: /s/ Parag G. Mehta
                                                  ------------------------------
                                               Name: Parag G. Mehta
                                               Title: Chief Executive Officer

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