Windows Software for emulation of drum and bass patterns (16 and less steps only). Emulates the TR-909, TR-808 sets, samples, and anything else you can find through a plug-in type interface and something called Rewire, which I am unfamiliar with.

Created by Propellerhead Software and distributed by Steinberg.

A lot of templates and so on, but I found that often most annoying, as there was no template for a blank set. :-(