SplitUp! - A fun and elegant tab manager
Workona - A better way to work in the browser.
Tab Stash - Tab Stash is a browser extension that helps you keep your tabs straight, saved, and restore them later.
Tab Manager Plus for Chrome - The only tab manager you'll ever need
Smart Tab Manager - Smart Tab Manager is a browser extension that allows you to save & restore your browser sessions.
Toby - Better Than Bookmarks