This was touched on in a recent thread in the
Technology for Fundraising forum. You can read the thread; here are a few titles and links of free and/or open source fundraising software that came up, listed roughly in order of how close to actually being Open Source they are:
VisibleResults: Java/Interbase (soon to be Firebird) OSS fundraising app: http://visibleresults.sourceforge.net/index-en.php
InfoCentral: PHP/mySQL OSS app. Designed for religious congregation management, but adaptable and usuable by other membership-based NPOs: http://www.infocentral.org/
ebase, of course: http://www.ebase.org
Devolio, free app developed by NPower in Access. It's sort of Open Source: the table structure, macros and code are all there and editable, but it runs on a proprietary app. http://www.npower.org/tools/donor+management.htm
Metrix, from Fund for the City of New York, same deal as Devolio - open source on a proprietary dbms (Access 2K) http://metrix.fcny.org/index.html
Organizers' Database: free, closed source (MS VB using Access MDB file format). Long description by developer/proponent in the linked thread: http://www.organizenow.net/odb/odb.php
Giving Database: Access-based db, free, fully functional demo version from technology consulting firm specializing in NPO services. Didn't d/l myself so I've no idea what's modifiable and what's not: http://www.willowmountain.com/giving.htm
http://www.etapestry.com - proprietary ASP, free for up to 500 donor records
-thomas