EZ-Poly is a free software synthesizer developed by Krakli. Available format(s): VST for Windows.
EZ-poly has an 8 step analog sequencer which syncs to your hosts tempo, or can be stepped with each new note, creating some fantastic tones and note-runs.
EZ-poly comes equipped with 30 presets from Tim Conrardy showing this synth off to its fullest.
http://www.krakli.com