Firefox Sync - Bring your Firefox bookmarks, tabs, or passwords wherever you go with Firefox Sync. Share between computers and mobile devices. Get Firefox now!
Workona - A better way to work in the browser.
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Session Buddy - Manage Your Browser Sessions
Diigo - Diigo is a powerful research tool and a knowledge-sharing community
Toby - Better Than Bookmarks