Editor: Jackbeat is an audio sequencer running on Linux and Mac OS X, for musicians and sound artists:
Drummachine interface with animations for easy and playful editing
Built for both composition and live setups with high interactivity needs
Easy to use but yet powerful by connecting with other applications using JACK and OSC
Loads and saves .jab files, Jackbeat's xml+tar open file format
Supports ALSA, CoreAudio, PulseAudio and JACK