BibMe- Works cited and bibliography pages created for you with full citations and correct formatting. Don't worry about where the comma goes ever again!
DropBox- Online file storage. Has handy apps for smartphones and tablets that mean no more hoping you remembered to email yourself the final draft of the paper that's due in about ten minutes.
Picnik- This photo editing site is free and easy to use. Graphics and photos are easily edited and enhanced on Picnik.
Zamzar- File conversion system. Turns any file into any other kind of file. A life-saver for getting around those "My file won't open on this computer!" freakouts.Sponsored by the Young Adult Library Services Association (YALSA), a division of the American Library Association.