libxmp is a module player library which supports many mainstream and obscure module formats, including Protracker MOD, Scream Tracker III S3M, and Impulse Tracker IT. Possible applications for libxmp include standalone module players, module player plugins for other players, module information extractors, background music replayers for games and other applications, module-to-mp3 converters, etc.
Jackbeat is a multi-platform audio sequencer for musicians and sound artists. Featuring a drum machine interface with animations for easy and playful editing, it is built for both composition and live setups with high interactivity needs. It is extremely easy to use yet powerful via connecting with other applications and plugins using JACK and OSC. Jackbeat loads and saves .jab files, Jackbeat's xml+tar open file format, and supports CoreAudio, ASIO, ALSA, PulseAudio, and JACK.