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I've bought Linux powered NAS Lacie ED Mini v2. Because the original firmware has only little features (no bittorrent client etc.) I've hacked it and replaced the original linux based firmware with debian lenny. Here is everything needed to do the same and various usefull tips and related programs.
SpecEd allows you to work with visible light spectrum. It can compute CIE coordinate for any combination of spectral colors and convert it to sRGB. The program is distributed under the terms of GNU GPL version 2.
Some other things mainly from school. Probably not much usefull.