Cartridge for the Commodore 64 that packs a punch

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

TeensyROM is a ROM Emulator, Fast Loader, MIDI and Internet cartridge for Commodore64/128

a tape port storage pod for the C64

cc65 library for accessing the DOS and network functions of the Ultimate II+ cartridge and Ultimate 64 motherboard

Open Hardware Fast Loader cartridge for the Commodore 64 and 128 - DO NOT USE!!!

64tass - cross assembler for 6502 etc. microprocessors - by soci/singular - [git clone from the original sourceforge repo]

A 3D maze game written in C for the Commodore 64

A multiplatform command line application to query csv files using a sql like syntax

Switchless kernal switcher for the common breadbin Commodore 64, "longboards". Reuses power LED for easier use.

A fun language compiler for 8-bit systems (6502, 6510, Z80, Atari, Commodore, NES, ZX Spectrum, Atmos) with great optimization.

The Eight Bit Algorithmic Language for Apple II, Commodore 64 and VIC20

Easyflash 3 toolset for macOS (fork of: http://bitbucket.org/skoe/easyflash)

cSID-light Commodore 64 SID player (clone)

Firmware for the MEGA65 DM65PIC

Sierpinski triangles on the Commodore 64

Brainfuck compiler that runs on the Commodore 64 (or any 6502-based computer supported by cc65 that has enough RAM)

This is a vintage maze puzzler in which player collect diamonds before time runs out.

cRSID by Hermit (https://csdb.dk/release/?id=245383), adapted for more general use

Extend David Malmborg's ByteBoozer 2.0, a data cruncher for Commodore files