Diigo is a social bookmarking website that allows you to improve your productivity and streamline the information workflow dramatically. The users can sign up to tag web pages and bookmark with this intuitive and easy tool. This program offers you to attach sticky notes and highlight any part of web page to a whole page or specific highlights. You can keep private these annotations, forward the special link to someone else, and share with a group within Diigo. There are complete online knowledge in personal library function, still the easiest way to collect the sites, and you can tag your collected web pages for easy future. Moreover, it is possible to add reminders, comments, or text directly with sticky notes on any web page. Diigo is a powerful and versatile multi-tool that you can share your researches with friends, classmates, and colleagues for knowledge sharing through collaborative platform.