I've recently made available a little project of mine called LoopCenter. It is a live-looping tool with a functionality very similar to the Boss LoopStation pedal. I use it mainly as a improvisation practice tool, but it could certainly be used for more compositionally-oriented stuff. Basically, you can set a tempo, and easily record and overdub small, measurized segments of audio, and then loop them. It is similar to SooperLooper (an excellent piece of software that I found only after making LoopCenter!), but pared-down, and perhaps easier to use. It runs with JACK. Check it out at: http://loopcenter.sourceforge.net Thanks! -Nick Choly