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 line start point to line end points in a network. It is based on a topology calculator and the A* search algorithm.

tOpos by archiseb is a 3D Topology Optimisation plugin which is using GPU for computation acceleration. It is based on CUDA technology provided by NVIDIA.

VisualARQ by F.Salla adds flexible BIM features to Rhino, and speeds up the process of modeling an architectural project in 2D and 3D. VisualARQ provides tools to generate all project document information and quantification.

Octopus by Robert Vierlinger was originally made for Multi-Objective Evolutionary Optimization. It allows the search for many goals at once, producing a range of optimized trade-off solutions between the extremes of each goal.

Voronoize by Ar37 is a grasshopper plugin that allows you to create voronoi structure from any Closed PolySurface, Open PolySurface, Non-Planar Surface, Planar Surface and Mesh.

Atträctor by Friedrich Söllner is an easy to use tool to transform grids according to given attractor geometry. This tool was developed for a beginners Grasshopper workshop at the Städelschule architecture class in Frankfurt/Germany.

Droid by ytsebastian is a 3D printing related Grasshopper Plug-in Library add-on, with control over model Slicing, Custom paths and Gcode generation. Designed to be used from small desktop 3d Printers, up to large scale Robotic Fabricators.

GeoDex 3 GH by David Mans is the Grasshopper 3D implementation of the GeoDex Library, a collection of around 150 curve, surface, and volume equations.