tabExtend - Easily save tabs and quickly create notes in your browser
Tab Stash - Tab Stash is a browser extension that helps you keep your tabs straight, saved, and restore them later.
Tabli - A simple, powerful tab manager
Tab Session Manager - Save and restore the state of windows and tabs.
Tabsets - Google Chrome extension to keep all the tabs you have open in a set so that you can open them all...
tabXpert - Next generation session manager