Pilou wrote:Tools used:
Engine - Stencyl 3.1.0
Graphics - Taron's Verve Painter 0.99u.12, Gimp 2.8, Inkscape 0.48, Spriter b10
Audio - Audacity 2.0.3, Bfxr 1.3.3, Garage Band
I don't see on your list Zbrush and Scratch (Byob-Snap) ...i am wrong ?

I used Stencyl, which has a similar "programming" interface to Scratch using blocks that snap together. I think Stencyl licensed the technology from MIT.
I didn't use Zbrush. I made the backgrounds in Verve Painter and then saved to PNG. Then I modified those images with Gimp. I used Inkscape to create the sprites, and the animations were done with Spriter.