Glicol : make music with code. connect different nodes like a synth, sequencer or sampler.
Orchestra toolbox : Orchestra is an open-source for live music performances in metaverse environments. Orchestra includes components for live performances in A-Frame/NAF-...
Pure Data (PD) : Pure Data (aka Pd) is an open source visual programming language. Pd enables musicians, visual artists, performers, researchers, and developers to cre...
MediaElement.js : HTML5 and made easy.
One file. Any browser. Same UI.
Punctual is a language for live coding audio and visuals. It allows you to build and change networks of signal processors (oscillators, filters, etc) on the fly.