Freesound : Freesound is a collaborative database of Creative Commons Licensed sounds. Browse, download and share sounds.
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....
Paul's Extreme Sound Stretch : This is a program for stretching the audio. It is suitable only for extreme sound stretching of the audio (like 50x) and for applying special effects ...
Wave.js : Audio visualizer library for javascript. Create dynamic animations that react to an audio file or audio stream.
FoxDot : FoxDot is an easy-to-use Python library that creates an interactive programming environment and talks to the powerful sound synthesis engine, called S...
Flocking : Flocking is a JavaScript audio synthesis framework designed for artists and musicians who are building creative and experimental Web-based sound proje...
Essentia : Open-source library and tools for audio and music analysis, description and synthesis
Glicol : make music with code. connect different nodes like a synth, sequencer or sampler.
Estuary : Estuary is a platform for collaboration and learning through live coding. It enables you to create sound, music, and visuals in a web browser. Key fea...
FoxDot : FoxDot is an easy-to-use Python library that creates an interactive programming environment and talks to the powerful sound synthesis engine, called S...
sonicsquirrel.net is a platform dedicated to netlabels and netaudio.
All music you find here is released under open licenses (mainly Creative Commons).