SplitUp! - A fun and elegant tab manager
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.
Tabbie - The missing tab manager for Chrome
Smart Tab Manager - Smart Tab Manager is a browser extension that allows you to save & restore your browser sessions.
Toby - Better Than Bookmarks