There are 16 repositories under c64 topic.
Software Automatic Mouth - Tiny Speech Synthesizer
Compile Java byte-code to native CPU's.
VirtualC64 is a cycle-accurate C64 emulator for macOS
The source from my Commodore 64 assembly programming tutorial for Windows
Sidekick64: A Versatile Software-Defined Cartridge for the C64, C128, C16, plus/4, and VIC20
SDK for developing with the llvm-mos compiler
C64Studio is a .NET based IDE specializing in game development for the C64 in assembler and BASIC
Byte-aligned, efficient lossless packer that is optimized for fast decompression on 8-bit micros
A harness for the Diagnostic Rev. 586220 Test for the Commodore C64
Collection of cartridges, adapters and replacements for the Commodore C64
SIDKick pico is an inexpensive dual-SID-replacement for the C64 and C128
Original sources and binaries for Supermon+64 V1.2 by Jim Butterfield
spritemate is a browser based sprite editor for the Commodore 64
Mad Pascal Compiler for 6502 (Atari XE/XL, C64, C4Plus, Neo6502)
A Java framework for building highly customizable PETSCII-enabled BBS, accessible from Commodore 64/128
Free open-source compressor for apLib with 5-7% better ratios
Disassembly (CA65) of the Commodore 64 port of the seminal space-sim Elite, by Ian Bell / David Braben.
A Commodore (CBM) BASIC V2 interpreter/compiler written in Java