Blender - Blender is the open source, cross platform suite of tools for 3D creation.
TextureLab - Free, Cross-Platform, GPU-Accelerated Procedural Texture Generator.
Autodesk 3DS Max - 3ds Max is software for 3D modeling, animation, rendering, and visualization. Create stunning game enrivonments, design visualizations, and virtual reality experiences.
NeoTextureEdit - NeoTextureEdit is an open source (GNU LGPL v.
ZBrush - ZBrush is a digital sculpting and painting software solution.
GraphicDesignerToolbox - Graphics editor for composing textures, buttons, logos, icons.