PhysX.GH is a rigid body simulation tool for Grasshopper, using open source real-time physics engine NVIDIA PhysX.

Tetris Game for Rhinoceros.   Use Left/Right keys to move the block, Up key or Space key to rotate, and Down key to move it down.  

This grasshopper component joins meshes in Rhino with similar materials so that you can reduce the number of meshes in a scene

Fast GPU-based physics simulation in Grasshopper supports free particles, fluids, rigid bodies, soft bodies, cloth, inflatables and custom constraints

Pong Game for Rhinoceros.   Use Up/Down keys to move the stick if you are in perspective (the sticks are in sides) if you rotate the scene

Culebra.NET is a 2D|3D Multi Object Behavior library written in C# (Wrapper around Culebra Java library) focused on hybrid system interactions.

A simple Tournament Bracket Generator.

Falcon is a plugin mainly for marker detection, Quaternion, Matrix calculation.