Antigravity.org (Popularity: )
http://www.antigravity.org Sergey Ivanenko explains gravity as an inertial phenomenon caused by movement of the universe with respect to higher dimensions.
Gravity Made Simple (Popularity: )
http://www.gravityms.com An unusual description of how gravity may work based on time and motion and the superstring theory where all things are vibrations.
Gravitational Force Vectoring (Popularity: )
http://www.HyperFlight.com A site describing how gravity can be created in the context of the conservation of energy and quantum mechanics, with information on related events.
Gravitation Lab Home (Popularity: )
http://www.GravitationLab.com Emphasizes the possibility and the need to test "expanding matter" models of gravity in an Earthbased laboratory. This could be done with a modified Cavendish balance. Also explores theoretical underpinnings, ...