Vetrix has released VSTRON, a freeware Korg Monotron inspired VST instrument available for Windows, developed with SynthEdit. The plugin features one oscillator, one filter, a set of built-in effects, and a modulation section with two envelope generators and LFOs.
More info about VSTRON:
VSTron is a free VST-Plugin that is well suited to create special FX sounds.
VSTron is an effective and fun VST unit that is capable of producing different kinds of effects such as Laser sounds, Fast LFO’s, Ascending/Descending Sweeps, Filtered madness, Bubbling Bleeps or attacking Ramps.
Initially inspired by the Korg Monotron the VSTron includes 1 Osc (Saw, Sine, Triangle, Ramp, Pulse, White Noise and Pink Noise) and 1 VCF Osc with 4 modes (Low Pass, High Pass, Band Pass, Band Reject) as well as 1 Main Envelope. To further modulate things you have 2 Envelopes and 2 LFO’s that can be individually assigned to different parameters and some built-in effects such as Drive, Delay and Chorus.