Other
Utah St. Univ.: Coin Tossing Applet
An interesting Applet that simulates the toss of a coin 100 times. A quick count of the results and an accompanying graph make this site useful for both teacher and student.
National Council of Teachers of Mathematics
Nctm: Illuminations: Random Drawing Tool
Students are able to to visualize the difference between theoretical and experimental probabilities with this computer based tool.