There are quite a lot of microcontroller RTOSes[1] for the AVR platform, which means you can run them on the Arduino (although you'll need to use avr-gcc not th

There are quite a lot of microcontroller RTOSes[1] for the AVR platform, which means you can run them on the Arduino (although you'll need to use avr-gcc not the Arduino IDE for these.) http://www.femtoos.org/ http://www.femtoos.org/ http://www.barello.net/avrx/ http://www.barello.net/avrx/ This one actually looks like it might use the Arduino IDE: http://code.google.com/p/duinos/ http://code.google.com/p/duinos/ (Also: GIYF: 'RTOS AVR' and 'RTOS arduino') [1] The hard part is separating anything that's a serious & maintained project from something someone developed once as a toy/interest project and never used for anything.