Mozilla Labs : TowTruck
https://mozillalabs.com/en-US/towtruck
TowTruck is a service for your website that makes it surprisingly easy to #collaborate in real-time.
TowTruck is incredibly easy to set up on your site. All you need to do is include a couple lines of #JavaScript and your site has #TowTruck tools enabled.
When a user comes to your site, they’ll be able to activate the TowTruck tool and send a link to a friend to start collaborating on the web site.
TowTruck has collaboration features like cursor-mirroring (allowing you to see your friend’s cursor on the screen in real time), collaboratively editing forms and text, browsing through the site, and both text and real-time voice chat.














