LeafVein is a graph theory plug-in for Grasshopper. You can generate graphs from geometric objects or maps and perform multiple graph algorithms.

Free Grasshopper plugin for naval architecture and marine industry.

Euglena is a small, single-celled organism known for having one of nature's simplest types of eyes.

Farsi Nevis is a fast and powerful plugin which allows you to create Persian (Farsi) and Arabic texts in Rhino without any external tools. You can also copy or convert the texts.

BrickBox allows to manage Grasshopper snippets from a canvas button which makes to drop and add snippets much faster

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.  

Package with teaching material and examples for several uses of visualizations with Rhino for different phases of the creation process.

Armadillo is a plugin based on parametric arrays along path curves. It can create wide range of solutions