Create and share tiled bookmark collections with Pearltrees.
An excellent way to share links and resources with colleagues and students - collaborative lists can even be set up. One of the best features is the ease of sharing bookmarks using Pearltrees, with options to share to Google+, Twitter, Facebook, Tumblr and Reddit at the click of a button...
...and my absolute favourite, the ability to embed your bookmark tiles into a webpage:
This can be done on Moodle too, allowing you to share links in a much more attractive and engaging way!