Snake Hill Games is an australian game development group that recently announced their project Sprite Lamp, a software tool that allows dynamic lighting on 2D graphics. You can find information on how it works in their site.
Kickstarter campain is planned to be launched on Nov 13th.
So it generates a normalmap from a 2D image. While not usefulfora gallery piece, as an ingame effect it would be amazing.
Even though it's great and helpful I would rather implement something like this to my game on realtime. That would really look great with pixel-art. Like this:
A very clever tool which I think will be very useful in the right project 
Had my coder friend show this to me and I think the concept is great. But for animated characters the workload would be a bit tedious by yourself, yet for the background effects it's really interesting.
Warning:
This is cool and interesting and even a great learning and ref tool. PJ will not accept pixels known to be created using this tool.
I am not entirely convinced ( yet) I would like to see the option for some color maps to allow hueshifting and measurements for palette control. Also, I don't think such a workflow is efficiant for a large amount of animated assets. Still it likely allows for some nice things.
Algunos resultados no me convencen mucho pero estare atento a su desarrollo.
Some results do not convince me but I'll see how it develops.
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It's definitely faster (though less accurate) than doing everything from scratch.