A "funner" applet that allows for more vectors to be added. Look for more applets by using search words "Vector", "addition", "component", "applet"
One of many nice visual internet programs that help with vectors
Get copies of all past regents exams and answer keys-Good for practice
Put together by Georgia State University. Easy to use for extra info on topics and many interactive aids and applets.
A number of great applets. The wave related ones are near the bottom of the page
This is a great animation sequence that explains refraction using Huygen's Principle.
This is one of the better doppler applets I have seen
This is an amazing applet for understanding many wave phenomena
This is the official document for New York State Regents Physics Curriculum. I am sorry if your life has gotten to the point where you are looking to this for fun reading.
This link will allow you to "see" electrons flowing in various circuits that you can easily build.