Spongefork for Mac

From Spongefork:

Spongefork is a complete softsynth, sampler, live improvisation instrument, and soundfile processing application. The 2.* series has been completely rewritten to provide many new features and native Mac OS X support. SF's oscillators and interface are controllable via a unique XY based modulation controller, your computer keyboard, or by any MIDI device or application. The original SF, released in April of 1999, was one of the first applications made specifically for gesturally controlled electronic improvisation. This sense of surprise and unpredictability is one of the virtues and unique attributes of Spongefork. Whether you are searching for raw material for your compositions, improvising with live musicians, or looking for a simple way to organize and perform your live sets, SF is still one of the most interesting software based instruments available today.