RhinoPiping LT is a free piping plugin. RhinoPiping Pro has many additional features, including Ifc export for AEC, and multiple iso generator (Pro+)

EvoluteTools T.MAP for Rhino 5 and 6 provides re-meshing using pure quad or triangle meshes, and texture mapping using quad or triangle patterns

Analysis Tools for Rhino

Concha is a Rhino3D plug-in for the numerical analysis of shell structures based on the Finite Element Method.

Parametric Ship Structural Design

ParaStaad is a grasshopper plug-in for professional structural analysis & interoperability linking Rhino/Grasshopper with StaadPro.

Render high-resolution, photorealistic images with realistic lights, materials and cameras directly in Rhino.

MeshPaths is primary Grasshopper component for finding Geodesic paths (lines) on meshes.