Liferay

Liferay is the World's leading open source enterprise portal platform which uses the latest in Java and Web 2.0 technologies. Liferay portals Runs on all major application servers & servlet containers, databases and operating systems with over 700 deployment combinations.
Liferay Framework:

• Built in Content management System (CMS)
• Out-of-the-box solutions to enhance the usability
• Inbuilt 60 portlets and over 20 themes
• Powerful development tools
• Supports all major servers, databases and operating systems
• Business friendly licenses
• Easy to use AJAX enabled user interface
• Technically sound architecture
  • SOA with web services support
  • LDAP integration & support
  • Rapid Portal Deployment using Portal As a Platform service
  • Secure EAI framework

Key features of Liferay CMS:

• Document library & Image gallery
• Integration with Microsoft office
• Multiple file uploads
• Dynamic Tagging
• Asset publisher
• Drag & Drop site maps
• SEO Optimization
• Rich Text editors
• Workspace publishing
• Dynamic virtual hosting
• Multi-language support

Collaboration features of Liferay:

• Wikis
• Message boards
• Blogs
• RSS
• Activity tracking
• Instant messaging
• Email
• Shared calendar
• Announcements & Alerts
• Dynamic virtual hosting
• Polls