C.Hackl has released GrooveBox, a free synth VSTi for Windows.

Features:

• HighPowerOSC: 9 Wavetables, each with the same wave. With the Super Effect you can make an unison Detune.
• Switch Area: Normally the Gate-sequencer is selected. Above the Gate-sequencer you have a selector where you can choose:
  • Gate Sequencer: 32 MIDI-Step-Sequencer.
  • Analyse: Normal Stereo Scope.
  • Custom Wave: Create your own waves with groundwaves.
  • MIDI Settings: 9 extra knobs for tuning the VST.
  • Enter Serial: For future protection (free for SM-Users).
• MIDI Learn: On knobs where you can tune the audio out you just right-click and select the MIDI CC you want to have. The MIDI CC is also put out when you tune knob (MIDI out of VSTi).
• Preset Manager: Reacts to Program Change.
• 30 Presets.