Website Find - Wheel Decide
Wheel Decide is a free spin the wheel web 2.0 tool. You can either create your own choices for the wheel by selecting to Make/Modify Wheel, or Browse Wheels to see existing wheels. Very easy to use tool that can be set up literally in seconds.
There are all sorts of applications for this in the classroom - from learning randomness in the math classroom, to assigning students to groups/topics/tasks, to making a class choice.