Opossum is the first model-based optimization tool for Grasshopper and based on the RBFOpt library
RhinoCFD adds the power of computational fluid dynamics to the CAD environment, allowing users of Rhino3d to undertake CFD investigation
Bake geometry, annotations and blocks with user defined attributes and or Rhino attributes. Reference and filter all Rhino objects into GH.
Lynx4D has a set of solar tools which you can get sun path diagram and shadow patterns for any area of the world.