Just googeled for myself and stumbled over a lot of interesting stuff that I once participated in:

Here's a brief list ... in no particular order:

Newlib: Did the original CellBE SPU/SPE patch.

TwoLame: Added a switch to change verbosity.

Transcode: Wrote the plugin for twolame, since it encoded mp2 much faster then mp2enc.

SciTE: Made file dialog size configurable and keep their state. Using a 400px wide dialog to select a file where character 250 differs is bad. Especially if you work on a 3200x1200 dual head setting.

RedBook:

[argl] ... time to upgrade my wordpress... just lost 70% of this post. Don't know which key I hit, but it was bad :(