Market leading real time kernel for 40+ microcontroller architectures
QNAP GPL Source
amforth is an extendible interpreter on microcontrollers
Q1-kernel a hybrid kernel
freeRTOS for Arduino Uno, Goldilocks 1284p & Mega 2560
Vampire OS is the alternative to Windows and macOS
A cute and educational x86 OS
The smallest and the most powerful operating system.
Linux kernel driver for Xbox One and Xbox Series X|S accessories
OS-9/6809 compatible operating system for Tandy CoCo and Dragon
Indipendent distro uses inary package system. Sulin is roolling donkey
RTOS for Secure, Safe and Real-Time Systems
Open-source RTOS and Embedded Systems Toolkit for C++ and C
Real-Time Embedded Operating System
PRTOS is a simple, compact preemptive RTOS for embedded systems
ext2/3/4 library for microcontrollers
W-Bus communication library
Run Linux on Windows or other OSes, natively.
Small real time operating system for AVR and ARM microcontrollers
Tool allowing you to put a Linux distro on a USB drive.