Project Babel 2 is an open source software made by Python/(for) Google App Engine. Community site is simply means that it started from content sites that only sends information to become a community site that is developed by interactive transmissions of information. Community site management is difficult, but it could develop into a great service once it hits the target.

Based on Forum or community site

Although there are many requirements for
community sites to run, basically they are all the same. Just like any other community site, talking to anyone in community sites about some contents do just fine. If you are thinking about a community site using Google App Engine, you should try Project Babel 2.

Project Babel 2 has been developed as the foundation of the community site. But now they changed the name to V2EX. V2EX even has a Twitter-like interface. It’s a community site where someone can post interesting topics and exchange everyone’s opinions about it.

UI for iPhone

Filtering with labeled is available, in addition to the PC that is optimized for the iPhone as well. It was made by HTML5 which is also remarkable. It is a very versatile software that also can be used as forums or social news.

livid’s v2ex at master – GitHub
http://github.com/livid/v2ex