pixeldudesmaker - Simple, web-based pixel art character generator.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
RPG Character Builder - Create thousands of unique character sprites for your 2D game project - free!
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
Universal LPC Spritesheet Character Generator - Powerful, animated character generator for creating 2D spritesheets
Unity - The multiplatform game creation tools for everyone.