This is a FREE website that makes little icons for the different websites you frequent.
I plan to use it exclusively for use in my classroom. I currently have boards for Virginia Studies, Language Arts, Science, and Math.
What's Symbaloo got that Pinterest doesn't, you ask? Well, for one thing, it's a direct link to the website. For another, you can organize and color-code/group ideas within the board more than with Pinterest. For example, everything that has to do with prewriting/graphic organizers are in green within the Language Arts board.
Do you use symbaloo in your classroom?