GroupStorm
GroupStorm helps you split people into random groups quickly. Just enter the names, choose how many groups you want (or how many people per group), and it does the rest. There is even a Fullscreen mode, letting you show only the groups and a title. The title is also editable, so you can customize the text as you need.
NameStorm
NameStorm lets you randomly select a student with the click of a button. NameStorm also has presets, so you can easily switch between classes, and not have to type in names every time.