SplitUp! - A fun and elegant tab manager
Tab Stash - Tab Stash is a browser extension that helps you keep your tabs straight, saved, and restore them later.
tabXpert - Next generation session manager
Smart Tab Manager - Smart Tab Manager is a browser extension that allows you to save & restore your browser sessions.
Tabli - A simple, powerful tab manager
Tab Session Manager - Save and restore the state of windows and tabs.