Scalable, optimized, secure RTOS for multiple hardware architectures
AO RTOS is small real time OS based on Active Object concurrency model
Simplest kernel for cooperative multithreading
Real time preemptive embedded multi-thread kernel
A UNIX-like kernel for the i386 architecture
Mulithreading Arduno library
Small real time operating system for AVR and ARM microcontrollers
Embedded Real-Time Operating System (RTOS)
Operating System in 512bytes.