Joey Sturgis Tones has released Pixelator, an audio resolution manipulation effect plug-in for Windows and Mac.
Audio resolution manipulator for sound design and destruction. This plugin was created with producers, sound designers, and musicians in mind and allows you to create low resolution audio and bit crushed sound through a variety of modes each with different sonic characteristics.
This is an audio processor, not an instrument.
Pixelator for Windows and Mac (VST/AU/RTAS/AAX) is available for purchase for the introductory price of $15 USD (regular $30 USD).