librosa : librosa is a python package for music and audio analysis. It provides the building blocks necessary to create music information retrieval systems.
Tone.js : Tone.js is a Web Audio framework for creating interactive music in the browser. The architecture of Tone.js aims to be familiar to both musicians and ...
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...
Flocking : Flocking is a JavaScript audio synthesis framework designed for artists and musicians who are building creative and experimental Web-based sound proje...
Audiotool : Audiotool is a powerful online music production studio right in your browser.
sonicsquirrel.net is a platform dedicated to netlabels and netaudio.
All music you find here is released under open licenses (mainly Creative Commons).