CrackArt

What is CrackArt

CrackArt is an open source 3D texturing application. CrackArt is object oriented and features a flexible plug-in architecture. CrackArt is released under the terms of the zlib license, which allows the development of 3rd party commercial plugins.
CrackArt's official website.

Texture Painting

Texture Baking

Spline Modeling

Materials Editor