Searching Community Discussion forums Collaborative Books Users User Management User authentication Profiles Role based permission system Platform Apache or IIS Unix / Linux / BSD / Solaris / Windows / Mac OS X support Database independence Multi-language Blogging Blogger API support Content syndication News aggregation Permalinks Content Polls Templating Threaded comments Version control Administration and Analysis Analysis, Tracking and Statistics Logging and Reporting Web based administration Performance and Scalability Caching Compression