NES-chip emulation
Famisynth 2 by MU-Station is an amazing VST that emulates the classic Nintendo Entertainment System (NES/Famicom) sound chip from the early 1980s.
The free chip vst plugin features a sound generator (4-bit or 8-bit) with 5 waveforms + a waveshaper, an ADSR-envelpe, and a modulation generator where you can affect the wave, speed, depth and delay of the sound.
The Famisynth 2 plugin can produce some very cool retro-sounds!
Famisynth has been updated to run on Windows 64 bit and Mac OS.