Interactive Simulations
Founded in 2002 by Nobel Laureate Carl Wieman, the PhET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations. PhET sims are based on extensive education research and engage students through an intuitive, game-like environment where students learn through exploration and discovery.
Explore physics 
General Physics Websites
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The Contemporary Physics Education ProjectFundamental particles and interactions, Plasma physics and Fusion, Nuclear science.
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Fear of PhysicsIncludes interactives and video links.
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HyperPhysics"HyperPhysics is an exploration environment for concepts in physics which employs concept maps and other linking strategies to facilitate smooth navigation." By By Rob Emery.
Also available as an iPad App. -
The Physics ClassroomIncludes animations and QuickTime movies designed to demonstrate physics principles in a visual manner.
- PhysicsCentral - learn how your world works