Drupal is a leading example of open source, web 2.0 software which allows individuals or a community of users to easily publish, manage and organize a wide variety of content on a website. »MORE»» 
The site supports an announcement block; individual member profiles and contact forms; personal blogs and community interest groups — seperate sections of the site tailored for different groups. »MORE»» 
What's the significance of 'open-source' software?
Beyond the much-hyped trendy websites, there is another powerful current shaping the future of the Internet: open source software. Not least because the ‘web servers’ that power the Internet, the world over, overwhelmingly run Linux, a powerful open-source software alternative to Windows. »MORE»»