Potential interesting 3rd party stuff.
Based on the concept of the legendary Roland drum synthesizers TR-909, TR-808 and TR-606 whose throbbing bassdrums and crashing hihats sent generations of dance-music enthusiasts into extasy, Drumstation combines cool old drum machine features with cutting-edge software synthesis technology.
Drumstation is a drum software synthesizer and features 8 channels of drums (either samples or synthesized drum sounds), programmable via an easy-to-use step sequencer, effects (realtime reverb, delay, flanger, filter, distortion) for each channel, loops could be sliced and stretched.
All this in the year 1998!This free downloadable version also contains - beside the standalone software synthesizer - a complete set of free drum samples and effects to get you started (Roland TR-606, TR-808, TR-909, Real Drums, Sound Effects, DR-101, DPM-48, and additional Yamaha/etc. sampled sounds).