Z80 shared library including some nice test-projects
A tapas/topaz/sapphire kernel optimized for smoothness and low-memory
Program and Game Manager for DOS
amforth is an extendible interpreter on microcontrollers
A bleeding-edge, security-centric Arch-based Linux distribution.
Universal server
AO RTOS is small real time OS based on Active Object concurrency model
uIDE (Micro IDE) is a free, open-source IDE for GPUtils
Q1-kernel a hybrid kernel
SIMD macro assembler unified for ARM, MIPS, PPC and x86
a self-contained development environment for embedded systems.
Transfer disks and disk images between the Apple II and the real world
Software build-automation tool written in Common Lisp
A high quality MP3 encoder
Building and running ancient Linux on Windows
A tiny and simple research operating system
Alternative operating system for x86 computers
Disk partitioning and data management for x86-compatible systems
Arduino Focuser, fully ASCOM complaint