Sites

Physics (Popularity: )
http://www.physics.org
Searchable database of resources from the Institute of Physics which matches user queries to handpicked sites. Also includes Physics Life animation.

Physics.it (Popularity: )
http://www.physics.it/
Links to selected physics lectures, from classical mechanics to quantum field theories.

Hypography Sci-Tech (Popularity: )
http://hypography.com/
A gateway to science with lots of physics and theoretical physics links.