Dynamic 3D Sectioning and 2D Layouts for Rhino Helps create sections that update with model changes.  Sections can create outline curves,

Ecotect is a highly visual software for architects to work with environmental performance issues. It is designed for early stages of conceptual design

        gHowl is a set of components which extend Grasshopper's ability to communicate and exchange information with other

This utility exposes a single command, ShortestWalk, which, given a network of curves, calculates the shortest path.

The ShortestWalk add-on for Grasshopper exposes one component which, given a network of curves and a list of lines, calculates the shortest route from

Firefly offers a set of software tools dedicated to bridging the gap between Grasshopper (a free plug-in for Rhino) and micro-controllers like the Ard

Meshedit is a set of components which extend Grasshopper's ability to work with meshes.     included components: utilities:

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