Tab Stash - Tab Stash is a browser extension that helps you keep your tabs straight, saved, and restore them later.
OneTab - Whenever you find yourself with too many tabs, click the OneTab icon to convert all of your tabs into a list. When you need to access the tabs again, you can either restore them individually or all at once.
SplitUp! - A fun and elegant tab manager
Workona - A better way to work in the browser.
Tab Session Manager - Save and restore the state of windows and tabs.
Tab Manager Plus for Chrome - The only tab manager you'll ever need