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Diigo

allows users to quickly annotate web-pages.

Sam Littlefair
Sam LittlefairAssociate Editor, LionsRoar.com · Written
Pocket, Trello, Inbox and Pinterest are all good, but Diigo is definitely the best. The highlighting and commenting is great. It comes with a reader function. And then you can read, compose, and organize in the web app itself. As a writer, it's one of my most important tools.
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