tabExtend - Easily save tabs and quickly create notes in your browser
Workona - A better way to work in the browser.
Tab Manager Plus for Chrome - The only tab manager you'll ever need
Tab Management by Motion (Beta) - The most powerful tab manager ever built as a Motion feature
Toby - Better Than Bookmarks
Lightbeam for Firefox - Mozilla is the not-for-profit behind the lightning fast Firefox browser. We put people over profit to give everyone more power online.