I haven't done a whole lot with it yet, but I am very intrigued with my Gumstix Overo Fire: http://www.gumstix.com/ http://www.gumstix.com/ The OpenEmbedded Li

I haven't done a whole lot with it yet, but I am very intrigued with my Gumstix Overo Fire: http://www.gumstix.com/ http://www.gumstix.com/ The OpenEmbedded Linux source can be had from http://www.gumstix.org/ http://www.gumstix.org/ While some work was done towards an Android port, it's not really working yet; I'd like to contribute to that but have not done so yet. My aim in purchasing my Gumstix was to have a login shell and local development tools for use in experimenting with ways to make mobile software consume less electrical power through software refactoring. For the most part I do that by reducing cache misses. http://www.warplife.com/tips/code/performance/kids-these-days.html http://www.warplife.com/tips/code/performance/kids-these-day... All the Gumstix boards have a selection of daughtercards for various kinds of I/O. I don't recall the name of the card I have for my Overo Fire, but it has quite a lot - more than the Raspberry PI. While the design of the Gumstix CPU cards is proprietary, that of the daughtercards is open source. The Gumstix company's aim is to encourage the development of Gumstix-based gadgets, perhaps with custom-built daughtercards; they make most of their money by selling Gumstix cards in bulk. The Overo Fire and at least some of the other Gumstix cards use TI OMAP "Video Processors". These are heterogeneous multicore CPUs. Mine has two cores, one an ARM Cortex A8, the other some manner of TI c6000 DSP. Gumstix.org doesn't provide source for the DSP but one can get SYSBIOS (formerly DSP/BIOS) free of charge from TI. TI's Code Composer Studio is somewhat costly, but one can get a fully-functional eval version, whose evaluation is long enough to develop typical DSP applications.