Document:

<PAGE>

                                                                Exhibit 10.9

                                            as of December 14, 1999

Work Management Solutions Inc.
75 Wells Avenue
Newton, Massachusetts 02457

Re: Extension of Maturity of Promissory Notes

Gentlemen:

      Reference is made to the promissory notes between LRF Investments, Inc.
("LRF") and Work Management Solutions Inc. (the "Company") listed on the
attached Schedule A hereto (the "Promissory Notes"). Capitalized terms used
herein and not otherwise defined shall have the meanings assigned to them in the
Promissory Notes.

      LRF hereby agrees with the Company to extent the maturity of the
Promissory Notes to December 31, 2001 unless otherwise amended in writing by the
parties hereto.

      THIS LETTER AGREEMENT TO EXTEND MATURITY SHALL, FOR ALL PURPOSES, BE
GOVERNED AND CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS OF THE COMMONWEALTH
OF MASSACHUSETTS EXCLUDING CHOICE OF LAW PRINCIPLES, shall take effect as a
sealed instrument as of the date first hereinabove written and shall be binding
on the parties hereto and their respective successors and assigns.

      This Letter Agreement may be executed in counterparts, each of which shall
be deemed an original, but which together shall constitute one and the same
instrument.

                                            Sincerely yours,

                                            LRF INVESTMENTS, INC.

                                            By: /s/ Joseph Freeman, President
                                                ------------------------------
                                                Name:
                                                Title:

ACCEPTED AND AGREED TO

WORK MANAGEMENT SOLUTIONS, INC.

By: /s/ S.M. Grange
    ---------------------
    Name: S.M. Grange
    Title: C.F.O.
<PAGE>

                        Work Management Solutions, Inc.                Exhibit A
                     Summary of Outstanding Promissory Notes

<TABLE>
<CAPTION>
===============================================================================================

===============================================================================================

Date of                                              Original Note                   Currently
 Note              Description     Current Terms        Amount      Amount Repaid   Outstanding
===============================================================================================
<S>         <C>                     <C>             <C>                <C>         <C>
4/20/1988   Revolving Credit        Due 12/31/99      100,000.00        54,435.53     45,564.47
-----------------------------------------------------------------------------------------------
4/20/1988   Subordinated Note       Due 12/31/99      240,000.00             0.00    240,000.00
-----------------------------------------------------------------------------------------------
10/25/1988  Subordinated Note       Due 12/31/99      160,000.00             0.00    160,000.00
-----------------------------------------------------------------------------------------------
8/15/1989   Secured Note            Due 12/31/99      500,000.00             0.00    500,000.00
-----------------------------------------------------------------------------------------------
1/29/1990   Line of Credit          Due 12/31/99      240,000.00       140,000.00    100,000.00
-----------------------------------------------------------------------------------------------
9/15/1991   Secured Note               Paid           250,000.00       250,000.00          0.00
-----------------------------------------------------------------------------------------------
               Sub Total Above                      1,490,000.00       444,435.53  1,045,564.47
-----------------------------------------------------------------------------------------------

===============================================================================================
</TABLE><PAGE>
                                                                Exhibit 10.10

                      Multitrak Software Development Corp.
                                119 Beach Street
                             Boston, MA 02111-2502

                                 April 30, 1992

LRF Investments, Inc.
189 Wells Avenue Suite 4
Newton, MA 02159

      Re: Multitrak Software Development Corp.

Dear Joe:

      The purpose of this letter is to confirm the agreements that we have made
with respect to the maturity dates for certain debt obligations owed to LRF
Investments, Inc. ("LRF") by Multitrak Software Development Corp. ("Multitrak")
and the extension of certain rights which LRF has under certain warrants issued
by Multitrak to LRF. This letter will confirm our agreement that LRF hereby
extends the maturity dates for each of the debt obligations owed by it by
Multitrak by one year from the original maturity dates indicated on each of the
debt obligations described on the "Summary Data of Notes Payable" attached
hereto. Multitrak hereby agrees that the warrants issued by Multitrak to LRF and
originally dated August 15, 1989 respectively for what are now 40,000 shares and
80,000 shares of Multitrak and which originally expired on March 31, 1993 are
hereby extended to March 31, 1994. This agreement is signed as an instrument
under seal. These agreements are in consideration for each other. Please confirm
your agreement to the foregoing by signing where provision is made below and
returning a signed copy to me.

                                            Sincerely yours,

                                            Multitrak Software Development Corp.

                                            By: /s/ Michael B. Shattow
                                                -----------------------------
                                                Michael B. Shattow, President
The foregoing is agreed to:

LRF Investments, Inc.

By: Joseph J. Freeman
    -----------------------
<PAGE>

MULTITRAK SOFTWARE
SUMMARY DATA ON NOTES PAYABLE
-----------------------------

<TABLE>
<CAPTION>
NAME                   DATE                                     ORIGINAL   REVISED                                           CURRENT
OF                     OF                 FACE      INTEREST    MATURITY   MATURITY  SPECIAL                               PRINCIPAL
ISSUE                  ISSUE            AMOUNT       RATE       DATE       DATE      FEATURES                            OUTSTANDING
<S>                    <C>        <C>            <C>           <C>        <C>        <C>                               <C>
REVOLVING CREDIT LINE  APR 20 88    $100,000.00  PRIME + 3.5%  MAY 31 91  MAY 31 93  SUBORDINATED TO SENIOR DEBT.         $45,564.47
                                                                                     SUBORDINATED TO BANK DEBT.
                                                                                     EQUITY REPURCHASE OPTION BY MSDC.
                                                                                     EXERCISE OF EQUITY REPURCHASE
                                                                                       OPTION MAY AFFECT ELECTION
                                                                                       OF DIRECTORS.
                                                                                     SECURED BY ASSETS.

SUBORDINATED NOTES     APR 20 88    $240,000.00  PRIME + 3.5%  APR 30 91  APR 30 93  SUBORDINATED TO SENIOR DEBT.        $240,000.00
                                                                                     SUBORDINATED TO BANK DEBT.
                                                                                     EQUITY REPURCHASE OPTION BY MSDC.
                                                                                     EXERCISE OF EQUITY REPURCHASE
                                                                                       OPTION MAY AFFECT ELECTION
                                                                                       OF DIRECTORS.
                                                                                     SECURED BY ASSETS.

SUBORDINATED NOTES     OCT 25 88    $160,000.00  PRIME + 3.5%  APR 30 91  APR 30 93  SUBORDINATED TO SENIOR DEBT.        $160,000.00
                                                                                     SUBORDINATED TO BANK DEBT.
                                                                                     EQUITY REPURCHASE OPTION BY MSDC.
                                                                                     EXERCISE OF EQUITY REPURCHASE
                                                                                       OPTION MAY AFFECT ELECTION
                                                                                       OF DIRECTORS.
                                                                                     SECURED BY ASSETS.

SECURED NOTE           AUG 15 89    $500,000.00  PRIME + 3.5%  APR 01 91  APR 01 93  SECURED BY ASSETS.                  $500,000.00
                                                                                     40,000 WARRANTS @ $1.75,
                                                                                       EXPIRING MAR 31 93.
                                                                                     80,000 WARRANTS @ $1.75,
                                                                                       EXPIRING MAR 31 93.
                                                                                     NOTE REPAYMENT BEGINS APR 01 93
                                                                                       @ APPROXIMATELY $17,000 PER
                                                                                       MONTH IF NOTE NOT REPAID
                                                                                       BY MAR 31 93.

LINE OF CREDIT         JAN 29 90    $240,000.00  PRIME + 3.5%  ON DEMAND  ON DEMAND  SECURED BY RECEIVABLES              $240,000.00

TOTAL LRF NOTES:                  $1,240,000.00                                                                        $1,185,564.47
                                  =============                                                                        =============
</TABLE>

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