FREE NORMAL MAPS CREATION

XNORMAL
Freeware. Here you can get tutorials








SMARTNORMAL
Online normal map creator

SHADERMAP  
Not free but not expensive. Cool interface and nice results. Demo available

NATRON: FREE COMPOSITING SOFTWARE

Free compositing software. BTW, very similar to Nuke. Interesting...
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SOFTWARE DE COMPO

Por cierto, muy similar a Nuke.