BINGO is good for review with vocabulary words. You can create the squares with whatever words you want, and this resource is easy to use.
You do, however, have to work the system if you want it to be free. The catch to this resource is that it only creates a PDF file that includes 5 Bingo cards. The way around this is to hit “back” on your browser after you have saved the file, then just hit “Generate” again. You can do this in sets of 5 until you have enough for your class.
Obviously this is a better choice for language classes, but it could be used with famous people or places, or even something like elements from the periodic table.