QMK customized Source Code
In case you know QMK and want to improve it. If you do please let me know!!!
(Arduino Leonardo, Micro, Teensy 2.0 and ProMicro). You need to comment/uncomment in keymap.c, config.h, and Keymmodore64.h according your board pins and leds.
already compiled .hex files to program your board
Select your board to download the right firmware for it.
If you do not know how to flash it, I recommend QMK Toolbox. For Teensy boards, you have Teensy Loader.