• The Physics Aviary - my "go to" site. Includes the Quick Graphing Tool my students use all year long! (Free)

• ExploreLearning Gizmos - nice introductory simulations, but can also use to record data ($)

• The Physics Classroom - textbook-like that includes various simulations and also practice problems. (Mostly free)

• oPhysics - another great simulation site. Also includes a drawing program.

• pHet Online Simulations - the "grand-daddy" of them all (Free)

Quantitative Skills and Advanced Calculus Topics in AP Physics C: Mechanics 

Calculus Relationships in AP Physics C: Electricity and Magnetism