PanoramaSensorsViewer : you can download it on github here, it's MIT licensed :
Imagine, adding this feature to your own site. For example, when you buy your hotel room, you could visit it snapping a QR code with your phone ...
See My other projects ...
You can share a link with your friends, just type the latitude/longitude.
Add this bookmarklet : Go to Topheman Street View to your bookmarks and click on it when you are on Google Maps to retrieve a link/QR-Code to get back to Topheman Street View at the exact same location.