Firefox Sync - Bring your Firefox bookmarks, tabs, or passwords wherever you go with Firefox Sync. Share between computers and mobile devices. Get Firefox now!
Pocket - When you find something you want to view later, put it in Pocket.
Linkman - Linkman Pro allows for managing large amount of URLs in its own database.
Pinboard - Pinboard is a personal archive for things you find online and don't want to forget.
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Diigo - Diigo is a powerful research tool and a knowledge-sharing community