H.G. Fortune has introduced a free drum machine for Windows, DrumBurst:
DrumBurst is an 8 parts drum machine with 64 waves at each slot making 512 waves in total: not too much for a quick selection but a good variety to work with. The inbuilt sequencer features 24 Main Pattern each based on the combination of a dedicated wave, Mute status and 1 out of 6 Step Pattern variations per part. This provides a lot of variation and less of programming effort as pattern can be re-used with a different instrument.
It’s a free download (.zip). If you give DrumBurst a try, let us know what you think of it!