This is a small collection of links, which you may find useful or entertaining...

Libsndfile a cross platform, multi-format audio library
Sweep, a very cool sound editor/explorer for linux
Audacity, another fine sound editor for both linux and windows
Toadware ImageMagic using GWC as a small piece of consulting (you know -- making money by selling services)!
cdrdao, a great way to burn CD's

My other music related project:
Mostly Celtic ABC files, for those who like to play jigs, reels and the like