Flippity.net! It's a very useful tool. It is part of Google Drive and uses spreadsheets to create all sorts of tools for your classroom.
A few of the highlights:
*Jeopardy style Board: Ask questions with point values. All sorts of different ways to use this, other than the boring jeopardy style version.
*Spin the Wheel: Spin the wheel to randomly choose something
*Tournament: Enter teams and Flippity will create a nice looking bracket for you
User-friendly interface, which provides a demo, instructions, and template for each tool.
You do all the work in Google Sheets and Flippity does the rest!
Check it out and spice up your classroom a bit!