SONIC - grasshopper plug-in

Developed by StudioNU "Sonic is a Grasshopper plugin that allows you to cast multiple rays, calculate these reflections and evaluate multiple surfaces at those points."

Link to "SONIC" webpage

Project Hummingbird - Grasshopper plug-in

Project Hummingbird is a set of Grasshopper components that facilitate the creation of Revit native geometry.

Link to "Project Hummingbird" blog