Diigo is a web 2.0 (social network) site designed to share bookmarks and lists. You may have noticed I used to use Delicious and fed my bookmarks to the sidebar of this blog. I have found Diigo to be much easier to use and much more powerful. Besides being able to bookmark and tag websites and feed links to the blog, I am able to create list lists for science subjects like Biology, Chemistry, Physics, Astronomy, Science Interactives, and so forth. I can add notes to websites that others in my network can see when they visit. I can even highlight and annotate part of a website and send that to others in the network. I am also able to create groups, like the At Home Science group I made, to which members can contribute and be emailed the latest posts as they are added, or daily, or weekly.
Diigo also has a very hand toolbar for bookmarking, highlighting and annotating websites. I have buttons that take me to my library website or displays links in a sidebar. If the toolbar is too much, you can drag the Diigolet to your links toolbar, then click on it whenever you want to save a website to your Diigo.
If you decide to use Diigo, be sure to follow me and join the group to send and receive great science links. If you don't join, feel free to browse my public library and lists.