Marmot is a plug-in for Grasshopper which allows the user to generate floorplans by specifying required rooms, connections and areas.

Bison is a landcape architecture plugin for Grasshopper + Rhino 6. It features tools for terrain mesh creation, analysis, editing, and annotation.

Koala is a plugin for export of model from Grasshopper to SCIA Engineer

Ladybug and Honeybee are open source environmental plugins for Grasshopper to help designers create an environmentally-conscious architecture

Structural form-finding and analysis for Rhino using 3d graphic statics and reciprocal polyhedrons.

Column and beam placement on orthogonal plans

Triceratops is a Grasshopper plugin that exports geometry from Grasshopper to a JSON file in the Three.js object scene format.

This plugin is a tight integration of the GDAL library into Grasshopper. It allows to read/write vector files and raster files.