Another beauty from Odo called SeeqOne (VSTi only) – freeware!

 
5 sequencers:
1 sequencer is for “Notes and Octaves” but can also be used for filter, Pulse Width, resonance or Phase modulation.
2 sequencers are used as envelope decays mainly for cutoff and oscillator pitch but also for pulse width and phasemod or resonance.
1 “normal” sequencer (no decay fx) can also be used for the same destinations.
Gate sequencer with mix option.
3 oscillators (sine/saw/ramp/pulse/triangle) – octave/note and fine tune for all of them.
5 filters – low/hi/band/4pole/8pole – and a filter envelope with Attack, Decay, Sustain and Level.
An extra oscillator for FM/PM/PW.
2 LFOs.
2 decay FX.
Left and right delay.
Glide.
Soft distortion.
64 presets.

Link:

http://www.odosynths.com/vst.htm