Press Here To Enter The Site: Noiseplug
Excellent experimental package.
Press Here To Enter The Site: Automat
A very deep synth with lots of great presets and access to many programming items.
Jack OS X is an OS X implementation of Jack, and it installs everything necessary to take full advantage of Jack on OS X. This includes:
Reference
SoundMagic Spectral is a FREEWARE suite of 23 Audio Unit plug-ins that implement real-time spectral processing of sound. This groundbreaking set of effects give you unprecedented control and creativity in the processing of audio, whether from static audio files or live audio streams. SoundMagic Spectral builds on the work of the OS 9 software known as SoundMagic DSP, and takes it to even more exotic sonic realms.
All software has links to website. Some ads but worth the visit.
http://www.hitsquad.com/smm/alphabetic/a/