“Diigo (dee'go) is about "Social Annotation". By combining social bookmarking, clippings, in situ annotation, tagging, full-text search, easy sharing and interactions, Diigo offers a powerful personal tool and a rich social platform for knowledge users, and in the process, turns the entire web into a writable, participatory and interactive media. The social annotation service introduced by Diigo allows users to add highlights and sticky notes, in situ, on any web page they read. Imagine a giant transparency overlaying on top of all the web pages. Users can write on the transparency as they wish, as private notes or public comments. And they can read public comments on the transparency left by other readers of the same page, and hear their "two cents" and interact with them.” (About Diigo, retrieved May 2009.)
Diigo allows allows to annotate web pages.
- There exist several kinds of clients, e.g.
- Connect to the DIIGO web site
- Web browser DIIGO extensions (several), e.g. Diigolet
- Web Widgets or services that interact with Diigo
- The "heavy" firefox client