This website shows tons of free games made by Dr. Jeffrey Ertzberger at UNCW. He has games for review for group and individual play. It is a website full of free and easy to use templates that use Microsoft Office.
This is a website that describes geocaching, which is a real life communal treasure hunt around the world. It involves the use of gps to find these "geocaches" in predestined areas. This can be an excellent tool in your class incorporated with your content in any core subject.
This is a site from the history channel in which they have a corresponding event for each date. This is a helpful bell warmer website for any history class, but specific events can also be searched and implemented.
This is a free animation site where students or teachers can create animations to show to their class. I've seen other sites, but this is the best combination of easy to use and fun tools. There are various characters, voices and settings.
Similar to glogs or prezzis, wikispaces provide a digial place for students to synthesize, express and design their knowledge into a fun and free product. This is the tool that our students at Isaac Bear used when they delivered their digital reflections