Java applets on Physics.  Cool site often used in class.

Splung.  Great site for definitions, links and applets.

If you want to waste quite a few hours looking at cool physics applets.  Try this site from Boulder , Colorado

The university of Toronto has some nice flash animations.

I love these Links from the university of Berkeley.  They remind me of...

If you are looking for explanations, try Hyperlinks

My physics Lab

Misconceptions explained

KQED

Want to impress that certain someone.  Try PHYSICS DEMONSTRATIONS.

The Physics Classroom ; this site has lots of tutorials and animations.