Unity - The multiplatform game creation tools for everyone.

The Powder Toy - The Powder Toy is a desktop version of the classic 'falling sand' physics sandbox game, it simulates air pressure and velocity as well as heat!

Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.

Sandboxels - Sandboxels is an in-browser falling sand simulation game, with mechanics such as heat simulation, electricity, density, chemical reactions, fire, explosions, and over 500 unique elements to play with.

Blender - Blender is the open source, cross platform suite of tools for 3D creation.

Powder Game - When whirlwind picks up the leaves, flow of the wind is visible and interesting. Simulation game that reproduces such phenomenon with powder (dot)! Let's vote by playing various uploaded works.