SuperCollider is still around and really mature, Sonic Pi and Overtone are build on top of it. CSound and Faust are more than mature also. https://supercollide

SuperCollider is still around and really mature, Sonic Pi and Overtone are build on top of it. CSound and Faust are more than mature also. https://supercollider.github.io/ https://supercollider.github.io/ https://sonic-pi.net/ https://sonic-pi.net/ https://overtone.github.io/ https://overtone.github.io/ https://csound.com/ https://csound.com/ https://faust.grame.fr/ https://faust.grame.fr/