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

RhinoCFD adds the power of computational fluid dynamics to the CAD environment, allowing users of Rhino3d to undertake CFD investigation

The RhinoPolyhedra plug-in for Rhino allow you to create over 630 different polyhedral shapes.

Grevit - Build your BIM Model in Grasshopper. Grevit allows you to create Revit or AutoCad BIM models directly in Grasshopper easily.

This component is for sending surfaces / domains / lines / members / nodesupports to new AxisVM Model continuously.

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

A Wallpaper-group Symmetry Array Tool For Rhino

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