I have posted versions of the ChibiOS/RT RTOS for AVR Arduinos, Due, and Teensy 3.0 as ChibiOSBeta20121212.zip http://code.google.com/p/beta-lib/downloads/list . A small patch is required to run ChibiOS on Due. This patch involves a hook for access to the Cortex M SysTick interrupt. Future versions …

ChibiOS/RT RTOS for Due

neil12 January 5, 2013, 8:04pm 3

For a discussion this is pretty good. Arduino Forum
Seems like the AYEs are with ChibiOS

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