Lighting Analysis - Run and Seen Within Revit

ElumTools http://www.elumtools.com/ is one of the best uses of the Revit API I think I have seen.  It truly shows what the future can hold for expanding the capabilities of BIM within the Revit Platform.  Currently still in Beta, you can sign up to be part of the testing on their website.  In the week or so that I have been involved, they had two beta releases to bring it to Beta 7 as well as a very responsive feedback team.  The video below shows the testing I did for the Beta 7 release.

ELUM Tools Beta 7 from Jason Grant on Vimeo.