I'm the lead developer of TortoiseSVN. I joined the project in its very early stages when it wasn't even usable, and I've been working on it ever since.
Of course, I always appreciate kind donations:
http://tortoisesvn.net/donate_stefan
Contributes to
TortoiseSVN,
CommitMonitor,
grepWin,
StExBar,
favIconizer,
demoHelper,
TrafficWatcher,
SVNProtocolHandler,
Subversion,
MailNoter, and
Gurtle.