Diigo is an online bookmarking and annotation tool that helps you save and share your favorite websites, articles, and images. It allows you to store and organize your bookmarks in an online library, and even collaborate with friends and colleagues. Diigo also allows you to highlight important text, add sticky notes, and attach tags to your bookmarks. You can also use Diigo to join groups, ask questions, and connect with others. Diigo is a great way to keep track of your research, keep up with the latest trends, and share your knowledge with the world.

Sharing options - The My Groups section enables collaboration, plus you can share content via Twitter and Facebook.workona.comNote-taking functionality - The annotation feature helps Diigo stand out from the competition, and being able to highlight or make detailed notes makes it ideal for note-takers.

While not as full-featured as the extension, this bookmarklet still offers the core features: bookmarking, highlighting, and notes.workona.comDiigo is a browser extension available on both Chrome and Firefox. If you don’t want to use an extension, Diigo does offer the Diigolet mode.

larkin.net.auWell, the main page for Diigo once proudly declared that it was a “powerful research tool and a knowledge sharing community”.