Toby - Better Than Bookmarks
Workona - A better way to work in the browser.
Tabagotchi - Keeping tabs on your tabs.
Session Buddy - Manage Your Browser Sessions
Tab Organizer - Rearrange messy tabs into groups of matching URLs
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.