QR Maps is a chrome extension to display QR Codes on Google Maps. This content script extension will add a "Code" link to Google Maps pages which will display a big, scannable QR code for the location or directions you're currently looking at.
It's not a generic QR URL encoder (of which there are already many). It's just meant to integrate seamlessly and non-obtrusively with Google Maps.

The license of this software is Freeware, you can free download and free use this browser plug-ins software.