This tool will allow you to create image and photo galleries of a variety of resources for class activities. It also has a very thorough and rich help/support feature.

This tool can be used in a variety of ways to store, reference and share bookmarks. I have also heard really great comments from other teachers on how they use it a lot.

This seems like a very interesting site/organization to note as an overview of the educational topics we are discussing so far. The bulleted articles are quite informative.