The RhinoPolyhedra plug-in for Rhino allow you to create over 650 different polyhedral shapes.

Includes general purpose components in math and geometry and fulfills missing necessities in Grasshopper.

Welcome to Metahopper - a tool for controlling Grasshopper with Grasshopper :)

SnappingGecko is a free Grasshopper plugin which provides object snapping features, helping you to keep your definitions clean.

Customize Grasshopper's GUI and toggle between your Custom GUI and Grasshopper's standard GUI.

Kangaroo is a Live Physics engine for interactive simulation, form-finding, optimisation and constraint solving.

Open-source combinatorial toolkit for discrete design. Offers tools to quickly generate geometry- and data-driven aggregations of generic parts.

Opossum offers some of the best performing optimization algorithms in Grasshopper: model-based RBFOpt and RBFMOpt and evolutionary CMA-ES and NSGA-II.