Megarachne is an open-source lightweight plug-in for Grasshopper.

Nemo is a Grasshopper plugin for Ship Design

The Marine Model Reports plugin for Rhino can generate a bill of masses and inertias from a vessel’s 3D model

Import & export many CAD formats into Rhino (ACIS, CATIA, Creo, FBX, glTF, IFC, Inventor, JT, Parasolid, Revit, SolidEdge, NX, 3DPDF, SOLIDWORKS...)

Learn modeling, fairing and reverse-engineering vessel hulls yourself with Rhino. This training teaches a versatile method for ships/ boats and yachts

package of tools created for more modeling of ship structure and creating class and workshop documentation visit SavaDesign doo on youtube

HoaryFox handles the Japanese structural BIM format ST-Bridge files. It supports model visualization and input/output of ST-Bridge files to Karamba3D.

AttributeAnalysis is a tool designed to give you a fast Analysis of your rhino model attributes.