
Even if some of them are now owned by major non-German companies (Apple, Yamaha), their roots are mainly in Germany:
Cubase - Steinberg (Hamburg)
Logic - C-Lab/Emagic (Hamburg) The former main developer Dr. Gerhard Lengeling still works for Apple as music application executive
Live - Ableton (Berlin)
Bitwig - Bitwig (Berlin)
Studio One - Presonus (Hamburg)