FreeRTOS - Realtime Scheduler
FreeRTOS.orgTM is a portable, open source, mini Real Time Kernel - a free to download and royalty free RTOS that can be used in commercial applications.
Ports exist for many different processor architectures and development tools.
Each official port includes a pre-configured example application demonstrating the kernel features, expediting learning, and permitting 'out of the box' development.
Free support is provided by an active user...
Tags: 68hcxx, 8051, arm, avr, coldfire, fpga, intel architecture, msp430, pic, rtos-free