Adjustable Spinner - Online spinner where you can adjust the number of sections, spin as many times as you want instantly, and easily track the data. (Shodor)
Chances - Die roller that the results can be seen in a bar graph with percentages for each roll. (NCES Kids' Zone)
Coin Toss - Toss a virtual coin as many times as you like. The results can be viewed as a list, table, or ratio.
Probability Fair - Play carnival games such as Duck Pluck, Plinko, Number Board, Shell Game, and Ticket Wheel. (Mr. Nussbaum)
Random Ball Picking Machine - Choose the likelihood of a blue or red ball being picked.
Probability and Chance - Introductory probability.
Probability - Contains lots of examples and simple word problems. Looks great!