Zen Patched Kernel Sources
amforth is an extendible interpreter on microcontrollers
Real-Time Event Frameworks based on active objects & state machines
AliOS Things latest version
Free cooperative operating system designed for microcontrollers
Free real-time operating system designed for microcontrollers
Open-source RTOS and Embedded Systems Toolkit for C++ and C
Small real time operating system for AVR and ARM microcontrollers
Embedded Real-Time Operating System (RTOS)
a very fast full system simulator
Smart home thermostat with touch screen and home automation