Free plug-in for Rhinoceros and Grasshopper - parametric 3D multizone building definition - combined thermal and daylight simulation - TRNSYS18

PANDO is a numerical process-based simulation tool that enables the user to model individual trees and canopies in Rhino Grasshopper interface.

Stella3D is a plugin developed by Erfan Rezae & Salar Anahid, which simulates the behavior of the particles in a customizable environment.

Hip and Gable Roofs.