MASKS FOR COMPOSITING IN BLENDER

Again, thanks to Oliver from Blendtuts.com

BEZIER, SPLINES

PX_Bezier from Pictrix  A lot of videos there. You can switch betwen bezier and poly mode... and free!

Bezier (free) and Easyspline (commercial) by Trueart are another interesting tools
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PX_Bezier de Pictrix  Varios vídeos. Se puede alternar entre modo bezier y polígono... y gratis!

Bezier (gratis) y Easyspline (commercial) de Trueart son otros interesantes pluguins

TrueArt (Bezier)