In this Grasshopper example file, you can simulate an optimized path from an origin point/points toward a set of targets. The strategy involves branching at diverging points. Example File
In this Grasshopper Millipede tutorial, you can learn how to model a series of smooth connecting columns to a roof and then analyze it using Millipede's Finite Element Analysis. Tutorial+Example
In this Grasshopper Kangaroo tutorial, you can discover how to simulate the flow of a series of particles on a solid and then convert it into a mesh. Example+Tutorial