PixIr lets you edit your photos with a full-range of editing tools online. I had fun playing with this one - it was easy to use and the first time I cropped a photo without too much moaning!
Prezi can help you make a more sophisticated presentation and get out of the PowerPoint rut.
Public Domain Review
Public Domain Review lets you know about the "coolest" items to become free to use thanks to expiring copyrights.
Wolfram Alpha is a "computational knowledge engine" for instant answers to natural language questions.
Great Websites for Kids
Links to great websites as selected by the American Library Association.