Zootool - a visual bookmarks tool, is about collecting, organizing and sharing your favorite images, videos, documents and links from all over the internet.

SharedCopy is an AJAX based web annotation tool that allows users to mark-up, highlight, draw, annotate, cache, sticky-note and finally share any website.

Pinboard is a bookmarking website intended for people who want to reliably keep track of large numbers of links. Its goals are to be useful, fight bloat, keep things fast, and stay small. Social bookmarking for introvert ...

Delicious is a social bookmarking service that allows users to tag, save, manage and share web pages from a centralized source. With emphasis on the power of the community, Delicious greatly improves how people discover, ...

"Diigo (DEE-go) is a Social bookmarking website which allows signed-up users to bookmark and tag web-pages. Additionally, it allows users to highlight any part of a webpage and attach sticky notes to specific highli ...