MU.LAB is a software application that transforms your computer into a real music studio. It does not overwhelm you with a complex feature set, in which you can get lost. On the contrary, MU.LAB is a user-friendly yet rock-solid musical tool designed to create, fine-tune and play Your Music.
Glitch Sequencer is a free cellular automaton based MIDI sequencer for the PC and Mac. It offers an interesting style of composition based on evolving patterns and is great for fast, fluid experimentation.
BankStep is a software emulation of hardware bank sequencers found in the big analog synthesizers, that produce control for the sound but not the sound itself. Instead of analog control voltages BankStep produces MIDI (and can make standard MIDI music files).
Otherwise, BankStep functionally emulates a big $50,000 bank of hardware sequencers and supporting modules just as it might sit on top of a big Moog analog synthesizer - or your soft synth, MIDI module or sound card.
reViSiT integrates a Tracker sequencing environment with the VST host sequencer application: receiving synchronization information directly from the host, and returning high-quality 'tracked' audio. The net result is that the composer can retain the familiar sequenced tracks and multi-tracking audio utilities of the host, while simultaneously benefiting from the advantages offered by trackers.
Gater is a 16th-note (semi-quaver) gate sequencer or 'trance' gate. It features an easy to use GUI with a handy randomize feature to invent new gate patterns. Two click-free gate shapes are available. The Gater uses very little CPU power or screen space and is compatible with VST 2.4.