[BuboBubo]

Another excellent Haskell based live-coding tool: https://tidalcycles.org/

Even if you don't know Haskell, it is a delight to improvise electronic music with this library. It comes with its own mini-language for dealing with musical patterns and can synchronize with any instrument. Very extensible, the backend uses https://github.com/musikinformatik/SuperDirt, a SuperCollider extension for dealing with synths / samples / effects.

[inciampati]

I'm taking the recent 8-week course now. Highly recommended. https://club.tidalcycles.org/t/weeks-1-4-index/395