Original Apollo 11 Guidance Computer (AGC) source code for the command and lunar modules.

the official Rust and C implementations of the BLAKE3 cryptographic hash function

Dozens of minimal operating systems to learn x86 system programming. Tested on Ubuntu 17.10 host in QEMU 2.10 and real hardware. Userland cheat at: https://github.com/cirosantilli/linux-kernel-modu…

The fastest and safest AV1 encoder.

📖 An approachable introduction to Assembly.

Source code and data of Second Reality by Future Crew in 1993

Floppy Bird (OS)

Fully documented and annotated source code for the cassette version of Elite on the BBC Micro

A wifi webradio with only low cost boards ESP8266 and VS1053 by Jp Cocatrix

Historical source code for Infocom's Z-machine interpreters

Original source code for Impulse Tracker, a music tracker for DOS

Program the esp32 ULP coprocessor in Arduino

Tiny assembler for 8086/8088, able to run over DOS for 8086/8088 machines.