Unconventional digital modeling synthesizer released by HrastProgrammer. It comes with no presets but it has its own kind of sounds/textures.
Lethality is an electric guitar VST released Iridium Iris, suitable for alternative and rock genres, with open and muted power / octave / refused chords and open and muted single notes.
VR-08 is a free and close tR-808 emulation released by Alipapa, built around whopping 2134 samples.
KORG DL-50 (Korg Delta) freeware simulation, develope by Full Bucket Music. Great retro synth strings and fat bass synth tones. In addendum to the original machine, Nabla features a phaser, a delay and true polyphony.