If you don't have Java, get the Java plugin.
Oscillations and Waves
Acoustics
Signal Processing
Electricity and Magnetism: Statics
Electrodynamics
Quantum Mechanics
Linear Algebra
Vector Calculus
Thermodynamics
Miscellaneous
Links to other educational sites with math/physicsrelated information or java applets useful for teaching:
And when you get tired of learning, here is some fun stuff:

