The insect identifier for the rest of us! Anyone can be an entymologist by putting in a few key pieces of information. Excellent resource for discovering the names of insects.
If you use PowerPoint in your room, this website has a whole bunch of templates for game show-type reviews. Works great with an interactive white board, too, if you have one.
Polleverywhere allows you to create questions and have people respond via text message, Twitter, or web. Great for use in a computer lab. Could also be used in conjunction with hand held devices (iPod touch, iPad, etc.) as a student response system.