Karamba3D is a parametric structural engineering tool which provides accurate analysis of spatial trusses, frames and shells.

Lattice structural optimisation toolbox

AXISVM parametric design tool. Export finite element structures into AXISVM from Grasshopper with this add-on and perform FE analyses.

Scan&Solve Pro™ for Rhino is a plugin from Intact Solutions that completely automates basic structural simulation on Rhino solids.

Falko Finite Element Analysis For Rhino