Titus suggests Sonic Fountry’s ACID which uses audio data pre-labeled with beats.
Tristan’s page references Celemony’s Melodyne, Bias’s Peak, Ableton’s Live, and Emagic’s Logic Audio.
I’ve personally used Cakewalk, Audacity, Fruity Loops, and Tracktion One (raw material software). I still must try Fruity Loops Studio (latest), and Tracktion Two.
[ynniv: you should check out Dr. Rex in the Reason suite, as well]
Review Criteria:
1. Automatic Segmentation Processes present – algorithms that find the beat, find the notes, or anything novel in this regard.
2. How the sound is organized into a GUI
3. Any other special features or upshots