Tab Stash - Tab Stash is a browser extension that helps you keep your tabs straight, saved, and restore them later.
TooManyTabs - Ever tried having 20 tabs or more open in Chrome?
Tabli - A simple, powerful tab manager
Firefox Sync - Bring your Firefox bookmarks, tabs, or passwords wherever you go with Firefox Sync. Share between computers and mobile devices. Get Firefox now!
tabExtend - Easily save tabs and quickly create notes in your browser
Dustman - Firefox extension to close unused tabs.