pichenettes/eurorack

This is the original code and hardware designs from Mutable Instruments, one of the best-known Eurorack module makers, by Emilie Gillet. It spans oscillators, filters, sequencers, texture synths and utility modules.

It's mainly useful as a source rather than something a musician installs directly. Other developers use it to build alternate firmware and ports for other hardware, which is why you'll see it credited across this site. The author asks that derivative works don't use the Mutable Instruments name.