Diferior is a flexible, customizable, both user and developer-friendly open-source, multi-purpose PHP content management system.

Main Features:
- Blogging system 
- Attachments 
- BBcode, smilies 
- Torrent tracker frontend 
- Both private and public torrent tracker support 
- HTTP/FTP link downloads 
- User-submitted downloads 
- User management with e-mail validation, captcha anti-spam protection 
- User profiles 
- User preferences 
- Easy to use admin interface 
- Template support 
- Multilanguage support 
- Caching 
- Plugin support 
- Forums 
- RSS feeds
Changes in Version 8.03:

Tagging
You will now be able to assign tags to blog posts and downloads. A significant addition for sites with loads of content. No longer will you have to decide which single category your submission best represents. Simply add some keywords to the tags field and it's all good.

Anonymous comments
Encouraging users to express themselves is essential for any growing community. Anonymous commenting is sort of "try before you buy" solution, allowing users to easily voice themselves on a particular matter, without going through a (~minute long) registration process.

IP-address hashing
With this option turned on, Diferior will hash client IP-addresses, instead of storing them in plain text. Since hashes are impossible to decrypt, your users will feel much safer about their privacy. Note that server configuration is still up to the server administrator, as it's way out of any regular WEB CMS's league.

Improved templating
While Diferior has a sophisticated templating system, introducing and distributing quick hacks to existing skins can be cumbersome. 8.03 has some improvements in it's template handling system which allow inclusions of extra stylesheets for current templates, thus enabling designers to code their own layouts and color schemes without messing with HTML or Smarty tags.

Forums improvements
With forum search, "quote" and "edit post" buttons it is now much easier to follow and participate in discussions. There are also some minor UI fixes, that make forums so much more fun to use.

Private messaging
This one was probably among top-requested features. Well, it's finally here. You can send, receive and reply to private messages, engage into personal conversations with other users or simply notify members of something. In case you're concerned about your users flooding each other, don't - there's a customizable PM box limit, as well as anti-flood control system.