GnuCash

http://www.gnucash.org/en/architecture.phtml

I mention this site 1) because it has a good architecture/road ahead statement that TWiki could learn from 2) because you might be interested in this, what looks like a neat piece of software, 3) you might have some experience of using it with TWiki and if you've implemented such integrations that makes my life easier

-- MartinCleaver - 09 Aug 2005

Another opensource accounting package: http://www.linuxcanada.com/

-- MartinCleaver - 09 Aug 2005