Open Educational Research (OER)
PhET simulations are open educational resources available for faculty to use. This program founded by Carl Wieman at the University of Colorado, Boulder, has grown over the past decade with additional faculty involvement and support from a team of developers to create the growing library which hosts over 100 simulations. Click here to view an example of a simulation on molecule structure.
You can view the full library by visiting their website: http://phet.colorado.edu.