https://spag.cc/ : File upload and sound recording for livecoding sessions
Flocking : Flocking is a JavaScript audio synthesis framework designed for artists and musicians who are building creative and experimental Web-based sound proje...
librosa : librosa is a python package for music and audio analysis. It provides the building blocks necessary to create music information retrieval systems.
Troop : Troop is a real-time collaborative tool that enables group live coding within the same document across multiple computers. Hypothetically Troop can ta...
Jukebox : Code for the paper "Jukebox: A Generative Model for Music"
sonicsquirrel.net is a platform dedicated to netlabels and netaudio.
All music you find here is released under open licenses (mainly Creative Commons).