MicroWorlds is a collection of tools assembled to provide the means create learning explorations in a computer environment.

Blender is free 3D software suite for creating models, animations, videos, and games.

Scratch is a new networked, media-rich programming environment, designed specifically to enhance the development of computational ideas and technological fluency of youth.

Flash is a widely used application that creates animations, imagery, and interactivity for the web.

There are numerous free programs that can be used to create graphics and sound for your games.