The open source web development platform
The project is built on cutting edge technologies and requires significant developer's effort and in-depth understanding in order to produce sophisticated web applications. On the other hand, creating a simple website is as easy as applying design and adding pages.
The are quite a few open source frameworks involved in the project. For example, the frontend is WEB20 with jQuery and HTML5 under the hood. And the backend is written in Scala and is using Spring Framework, Hibernate, Freemarker, JSP, PostgreSQL and more.