Serio3 is a free software synthesizer developed by Dario Lupo / Daze. Available format(s): VST for Windows.
Serio3 is a 3-oscillator Subtractive Synthesizer with 3 Sub OSCs, an ADSR for each OSC, Ring Modulation, 2 Filters, 2 LFOs, a Stereo Enhancer, Delay, Reverb and Chorus Effects.
http://www.dazesounds.com/