pixeldudesmaker - Simple, web-based pixel art character generator.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Game Character Hub - helper program for game design (RPG Maker XP/VX and more)
ShapeShop - ShapeShop is an advanced and professional 3D design and modeling application that comes with an easy-to-use and user-friendly interface.
Misfit Model 3D - Misfit Model 3D is a 3D model editor that basically operates with triangle-based models.
001 Game Creator - Make Games. No Coding.