Stars
A version of the keypad library found in Wiring. This is just a copy made compatible with the Arduino IDE library manager.
The source code to Duane Blehm's three Macintosh games
My tinkerings with the source code for Glypha III, which was originally made for the classic Mac OS (i.e. pre-OSX) by John Calhoun, i.e. @EngineersNeedArt
Original Apollo 11 Guidance Computer (AGC) source code for the command and lunar modules.