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

A 2D multiple curves Trimming tool

DistanceParallel is a python command for Rhino that measures the distance between two parallel planar surfaces.

BullAnt is a Rhino3d/Grasshopper plug-in primarily for Architects and Engineers (but also other Rhino/Grasshopper users) featuring computational

A set of tools for creating jewellery within Rhino6.

Clipper is a 2D polygon Clipper offering polygon boolean operations (clipping): Intersection, Join, Difference, and robust polygon offsets.