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Diigolet Diigolet is not as feature-rich as the Diigo toolbar, but it can be set-up by simple drag-and-drop - no download or installation needed, and it works for all major browsers. Much more powerful than bookmarklets offered by other social bookmarking sites, Diigolet is a "super bookmarklet" that allows you to highlight and add sticky-notes, in addition to simple bookmarking. You can get started by watching a tutorial video.