Diigo

Diigo is a site that allows the user to add annotated links to web pages, articles, journals, .pdfs, etc. Some of its key features include the tags and the diiglet toolbar.

The diiglet tool bar can be bookmarked and allows the user to annotate text within a web page article, add sticky notes, etc. The annotations will then appear on the diigo page as text boxes following the name and url for the document. In addition, diigo has it's own tool bar; however several individuals who tried to install this toolbard began to have problems with their computers and needed to uninstall the product.

One can also create a group page within Diigo where multiple users can share and annotate links.

Like many Web 2.0 products, one can have elect other diigo sites to follow, have friends, and chat with other diigo users online.