Inphonik PCM2612 Retro Decimator Unit

PCM2612 Retro Decimator Unit is a free bitcrusher effect. It is based on Inphonik’s previously released RYM2612 Iconic FM Synthesizer plugin, which emulates the Sega Genesis sound chip.

The PCM2612 is based on the PCM playback feature of Inphonik’s RYM2612 Iconic FM Synthesiser. The RYM2612 is an emulation of Yamaha’s YM2612 sound chip famously used in the Sega Genesis.

The PCM2612 has a large central knob that controls the amount of 8-bit decimation applied to the source. Below is a mono switch, a dry/wet mix knob, and an output filtering switch. The output filtering switch lets you choose between the Crystal Clear digital output and the Legacy line output of the Sega Genesis Model 1 output circuit.

https://www.inphonik.com/products/pcm2612-retro-decimator-unit/

PAPU & ither 8bit synths

PAPU Synthesizer
It’s a new 8bit synth for PC/Mac
Emulates hardware of Nintendo Gameboy

SN76489 Synthesizer
This virtual instrument is a free VST/AU 8bit synthesizer that emulates the Texas Instruments SN76489 of the Sega Master System and other.


Voc Synthesizer emulates glottis and shape of vocal tract. 
Constrict oral cavity to change sound.


RP2A03 emulates Ricoh 2A03of the NTSC Nintendo Entertainment System.


Commodore 64 SID  emulates MOS Technology SID of the Commodore 64


https://socalabs.com

retro boy

Retro Boy is a virtual analog chiptune synth/emulator. Chiptune or otherwise known as 8-bit music is music or sounds synthesized by the sound chip of computers, video game systems, and most handled gaming systems. Retro Boy features a single oscillator that has seven waveshapes: 12.5% pulse, 25% pulse, %50 pulse, saw, triangle, sine, and noise.

http://www.sbaudio.org/retro-boy