COBWEB4 (a.k.a. Regina Energy Model) is currently in development. It is planned to be a 3D city grid simulation to model household energy use, among other things. A preview is below. This video file is available for downloads here.
COBWEB is a standalone software that can be easily setup and run. But before you download the file here's is a quick animation of what the interface of COBWEB looks like:
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