http://www.microchip.com/forums/tm.aspx?m=417648
http://www.rowebots.com/
DspNano for PIC24/dsPIC33
http://rowebots.com/khxc/index.php?app=ccp0&ns=catshow&ref=dspnano
Unison for PIC32
http://rowebots.com/khxc/index.php?app=ccp0&ns=catshow&ref=unison
Both product used to cost US$14995 according to the website.

I have not downloaded it yet. According to the forum posts, it is
quite like nano-Linux with pThreads, semaphores, signals and
mqueue (message queue?).

-- 
Xiaofan http://mcuee.blogspot.com
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