Xenobioz has released Kruudster, a freeware hybrid synthesizer in VSTi plugin format for Windows (made with SynthEdit). Kruudster is a free Hybrid Synthesizer VST instrument plug-in for Windows with drawable low resolution waveforms. Kruudster is available for free download via Xenobioz (3.6MB download size, 32-bit VSTi plugin format for Windows). The instrument features a waveform editor, thus making it possible to create your own waveforms for the oscillator. Kruudster also comes with a built-in arpeggiator, step modulator, randomizer, and 128 factory presets.
Xenobioz has recently released another similar freeware instrument called Kruud. You’ll find that one and several other freeware synths on the download page linked below.