Cheerz

The Japanese company KLab launched Cheerz before. They now re-launch a lite version which does not draw as heavy on the browser as the earlier version. It rather starts and runs very smoothly. Cheerz has a web page check-in, stick man figures with Twitter/Facebook-images as heads, and chat in chat balloons. It allows you to rate ("cheer") web pages. A billboard shows messages of people who commented the page earlier.

The system is built on XMPP with small extensions. It is a browser add-on for Firefox, Chrome and Internet Explorer (!). The addon communicates with the Cheerz XMPP server, joins and leaves XMPP chat rooms as the user enters and leaves pages.