@it (reads atit is a free GIS plugin for Grasshopper to parse the geospatial data sets.

Performs structural, thermal, and vibration analysis on solids in Grasshopper.

Jellyfish is a Grasshopper plugin to provide an intuitive and fast way to model, manipulate, and visualize implicit geometries.

Biber is a plug-in for Rhino-Grasshopper which enables Parametric Joinery.