Diigo is much, much more than just another bookmark app. Short for "Digest of Internet Information, Groups and Other stuff," this browser extension is a great way to collect, annotate, organize, and share web content. Available for Chrome, IE, and Firefox, users will need to create an account to get started. From there, Diigo may be used to bookmark a page (using the Save option), take a screenshot, highlight certain parts of the page that are of interest, add sticky notes, and even share with friends - all from a user friendly interface. With its functions as a bookmark app, an annotation app, and a new kind of social media, many readers will find Diigo to be a favorite new tool for web research.