DAZ 3D - Daz 3D, 3D Models, 3D Animation, 3D Software
The Character Creator - aims to provide a fun and easy way to help you find a look for your characters.
MakeHuman - MakeHuman is a free, open source, interactive modeling tool for creating custom 3D human characters.
Portrait Wizard - Create custom hand-drawn like character portraits
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
ePic Character Generator - ePic Character Generator lets you create realistic character images as assets for games, illustrations for stories, or avatars for role-playing sessions.