Open Cubic Player (unix fork). Music visualizer for various tracked music formats (amiga modules, S3M, IT), chiptunes and other formats related to demoscene

SIDKick pico is an inexpensive dual-SID-replacement for the C64 and C128

SIDKick -- the first complete SID 6581/8580-drop-in-replacement that you can build yourself

SID chip and 6502 CPU emulator, with audio output on pin PA8 (PWM) or PA4 (DAC), for STM32 line of microcontrollers, compiled with Arduino IDE

MOS6581 SID chip emulator in SystemVerilog

Network SID Device

Console application for playing C64 SID and MUS files

captvolt Eurorack Modules for VCV

STM32 player for Commodore 64 SID files. (6581/8580)

Furnace's up-and-coming C64 hardware export for 0.7

Original and reverse-engineered music players

Net-SID port for the CycloneIV