TooManyTabs - Ever tried having 20 tabs or more open in Chrome?
Pocket - When you find something you want to view later, put it in Pocket.
Tab Wrangler - Automatically closes inactive browser tabs
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.
URL Manager Pro - URL Manager Pro for Mac OS, the most powerful bookmark manager for the Mac for use with Safari, Firefox and Chrome
Toby - Better Than Bookmarks