Quick and easy for short URLs. Started using it a couple of months ago when Short Link said I had reached some sort of limit. Short Link's UI is nicer but URL Shortener for Google Chrome certainly gets the job done. I wish the shortened URL would automatically copy to the clipboard, and that there was a way to copy the automatically-generated QR code.
The plugin falls under the 'API Tools' category and offers features such as API integration, URL shortening, custom alias creation, geo-targeting & device targeting, QR code generation, link management, and data export