Google Chrome: It's easy to fill up the tab bar in Chrome to the point where you can't read the tab titles or easily find what you're looking for. VerticalTab lets you view tabs in a list and search, sort and more.
VerticalTabs places a small icon in the Chrome toolbar next to the address box. Clicking on the icon displays all your tabs in a vertical list where you can select tabs or drag and drop them via mouse input or using keyboard shortcuts. In the options menu you can change the width and size of the vertical tab display and toggle the tab-count display on and off.
VerticalTabs is free and works wherever Google Chrome does. Have a favourite extension for wrangling tabs? Let's hear about it in the comments.
VerticalTabs [Google Chrome Extensions]