Ladybug Tools
(by Mostapha Sadeghipour Roudsari)
Ladybug and Honeybee are open source environmental plugins for Grasshopper to help designers create an environmentally-conscious architecture
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Ladybug allows you to import and analyze standard weather data in Grasshopper; draw diagrams like Sun-path, wind-rose, radiation-rose, etc; customize the diagrams in several ways; run radiation analysis, shadow studies, and view analysis.

Honeybee connects Grasshopper3D to validated simulation engines such as EnergyPlus, Radiance, Daysim and OpenStudio for building energy, comfort, daylighting and lighting simulation.

Licensed under @license GPL-3.0+: ( Read more here about the license.