i have been using diigo for 7 years or so; this is the only bookmarking app (AFAIK) that let's you _highlight text_ and add _stick notes_ on the page you bookma

i have been using diigo for 7 years or so; this is the only bookmarking app (AFAIK) that let's you _highlight text_ and add _stick notes_ on the page you bookmarked--great for research--you can retrieve the bookmarked page and immediately go to the portion of interest; it's also great for sharing links--facilitates communication when you can highlight the single sentence or two of interest or when you can continue the dialog on the web page itself (w/ sticky note on the page pointing to the text you wish to emphasize).