Helio Workstation is free and open-source music sequencer, designed to be used on all major platforms. One music sequencer for all major platforms, both desktop and mobile.
Giada is a free, minimal, hardcore audio tool for DJs, live performers and electronic musicians. How does it work? Just pick up your channel, fill it with samples or MIDI events and start the show by using this tiny piece of software as a loop machine, drum machine, sequencer, live sampler or yet as a plugin/effect host.
Nova3 is a free VST Generative Sequencer plugin. The plugin is for Windows only, and includes an x32 and x64 version.
Metatron is a free 2 oscillator VST analog synthesizer instrument with an arpeggiator that works alongside a gated modulation sequencer for creating unique rhythmic patterns and sounds. The oscillator section uses waveforms that double up to create a phasing effect similar to pulse width, but for each waveform.
WAHNbeat vsti was just going to be a visual – but it grew, and actually turned out pretty darn good. Features a great collection of urban samples, beatboxes, voxes, raggachops…