Have you heard about Diigo ? Diigo (pronounced deego) is a free social bookmarking tool with a difference. It can be used to grab entire Web pages and make annotations right on top of the content. It can also be used to create a personal archive that can be viewed them even when the source site is no longer there. The service has a plug-in that lets you highlight, clip and sticky-note any Web page and save text or just page URLs .You can categorize and tag your findings for later and keep them private, share them with friends or make them publicly viewable. Will you Diigo?
Adapted from CNET editors’ review, by: Rafe Needleman on August 25, 2009