An interactive design environment for building energy evaluation and optimization.

gEnergy brings building simulation to the cloud, using all the features of EnergyPlus on the web, accessible any time, any where. Using on-line web collaboration, you can work with, train and support your colleagues and customers in the development of EnergyPlus models. With rich graphical reports, hyperlinked commenting, model versioning, HVAC graph editing, the ability to import both gbXML and IDF models, and many other features, gEnergy is a powerful EnergyPlus-based simulation tool for you and your business. Find out about gEnergy’s features and functionality.

BlueSol is a software for the design of photovoltaic systems

Parametric analysis is often used for exploring design options and identifying the relationship between design parameters and performance. The jEPlus tool has been developed specifically for performing complex parametric analysis with EnergyPlus. It provides a GUI for defining design parameters, editing models, manage simulation runs, and collecting results. With the GUI, hundreds of thousands of simulation cases may be created in the matter of minutes.

DIAL+ is a very intuitive suite of tools dealing with the optimization of energy loads on the room scale. DIAL+Lighting allows to simulate Daylighting as well as Electric Lighting (Radiance® simulations). It is linked to another simulation module (DIAL+Cooling) that allows to perform dynamic thermal simulation.

DIAL+ is a very intuitive suite of tools dealing with the optimization of energy loads on the room scale. DIAL+Cooling allows to perform dynamic thermal simulation and natural ventilation calculations. It is linked to another simulation module (DIAL+Lighting) that allows to simulate Daylighting as well as Electric Lighting (Radiance® simulations)

Dynamic energy simulation tool

The nation's largest dataset of information about the energy-related characteristics of commercial and residential buildings.

Ladybug is a free and open source environmental plugin for Grasshopper to help designers create an environmentally-conscious architectural design. The initial step in the design process should be the weather data analysis; a thorough understanding of the weather data will, more likely, lead designers to high-performance design decisions.

TRNSYS - a component based transient simulation package.