A really amazing little program that allows you to pixel your low poly models without making any uv maps. You can find the thread for it
here
Note: this is not my program and i take no credit for it, im simply sharing my find.
This is the sample scene provided with it and the map generated.
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and i redid my little truck using it.
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heres the uv's for my truck (i only really did the part seen)
Just had a quick play with it. Is there no eyedropper style tool? How do i get a colour back after painting it on?