SonoBus : SonoBus is an easy to use application for streaming high-quality, low-latency peer-to-peer audio between devices over the internet or a local network....
VSTPLANET : VST Plugins Free - Virtual instruments and effects
Glicol : make music with code. connect different nodes like a synth, sequencer or sampler.
sfxr : A tool to quickly generate 8bit/16 bit-soud effects!
sonicsquirrel.net : sonicsquirrel.net is a platform dedicated to netlabels and netaudio.
All music you find here is released under open licenses (mainly Creative Commons)...
