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.
Tabbie - The missing tab manager for Chrome
Session Buddy - Manage Your Browser Sessions
tabExtend - Easily save tabs and quickly create notes in your browser
Tabs Outliner - Next Generation Session, Windows, Tabs Manager and a TooManyTabs Solution That Really Works.
Toby - Better Than Bookmarks