Honeybee connects Grasshopper3D to EnergyPlus, Radiance, Daysim and OpenStudio for building energy and daylighting simulation.The Honeybee project intends to make many of the features of these simulation tools available in a parametric way.
You need to have Ladybug installed in order to run Honeybee.
Honeybee: A Plugin for Environmental Analysis (GPL) started by Mostapha Sadeghipour Roudsari
Copyright (c) 2013-2015, Mostapha Sadeghipour Roudsari
Honeybee is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.
Honeybee is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with Honeybee; If not, see http://www.gnu.org/licenses/.
@license GPL-3.0+ http://spdx.org/licenses/GPL-3.0+
Honeybee group page on Grasshopper
So many thanks to Radiance, Daysim, EnergyPlus and OpenStudio!