PhET: Some really good physics simulations.
Number2 Question of the Day: ACT Practice Question
Institute and Museum of the History of Science: Lots of good Galileo stuff.
Web Sites that have free physics related downloads
Interactive Physics: MSC Working Knowledge (formerly Knowledge Revolution), the creators of the physics simulation program we use in class.
Request an Evaluation Copy of Interactive Physics
Phun/Algodoo: A very cool physics simulation program, similar but more colorful than Interactive Physics, with some extra capabilities. The Phun version is free!
Yenka: A free download of a physics simulation program.
Web Sites to practice topics we cover in class