Tabagotchi VS tabExtend

Toby - Better Than Bookmarks

Workona - A better way to work in the browser.

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.

xTab - Limit the maximum number of tabs you can open at once

Tablerone - Browser extension for saving, organising, and exporting tabs. Save multiple tabs with one click. Get more done with a clean browser.

Saka - Elegant tab search, selection and beyond.