Diigo – Wikipedia, the free encyclopedia

Diigo (DEE-go) is a Social bookmarking website which allows signed users to bookmark and tag web-pages. More exclusively, it allows users to highlight any part of a webpage and attach sticky notes to specific highlights or to a whole page. These annotations can be kept private, shared with a group within Diigo or a special link forwarded to someone else. The name "Diigo" is an abbreviation for "Digest of Internet Information, Groups and Other stuff".[1]