Jackbeat is an audio sequencer running on Linux, Windows and 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
- Extremely easy to use but yet powerful by connecting with other applications and plugins using JACK and OSC
- Loads and saves .jab files, Jackbeat's xml+tar open file format
- Supports native audio devices, PulseAudio and JACK
Some usage hints are included in the README.