This is a list of a lot of great sites. This link takes you to the educational favorites.
Animoto! Make a 30 sec. video for free! (Signing up is necessary. You don't have to "Purchase Video")
Diigo! Save all of your favorite websites at this "social bookmarking" site. You can make groups and even highlight parts of the website!
GoodReads Do you love to read? Would you like to keep track of all the books you have read? Or find out what other people are reading? Sign up for GoodReads--it is Super Fun!