The AmenBreak Generator, from the developer of Loop Twister, is now free for a limited time!
The Amen Break is easily the most sampled drum loop in history (scroll down for the complete history), and the AmenBreak Generator lets you flip-the-fuck-out with it. It lacks audio recording/exporting, but it is fun! You could probably use it to practice your breaks leading up to the release of GlitchBreaks!
If you haven't already studied the history of the Amen Break, you owe it to yourself to watch this 18 minute lesson on the most important 6 second recording in music. It gives a lot of insights into sampling, copyrights, and who really makes money on those sample CDs.