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These two videos show the SDL port of Quake and a free version of Doom being played on the Ben NanoNote pocket computer. They were created by TUXBRAIN, a company based in Spain, that sells products based on open source software, including the Ben NanoNote and several other devices in their online shop.
The poor video quality is due to multiple conversions as they explain in their accompanying article which features download links for better quality versions. To download Quake and Doom as well as other games for the Ben NanoNote go to this page on Qi Hardware.