PerfCMS - free content management system (CMS) written in PHP and open source.
PerfCMS v2 - based on the popular web-framework Yii (http://yiiframework.com) and using templater Twig (http://twig.sensiolabs.org), which are freely available to anyone.
PerfCMS has sufficient initial functionality to create a full site actually any need.
Standard Features PerfCMS v2 include: 
 + System authorization / registration 
 + Recover password account via e-mail 
 + Powerful admin panel 
 + Forum 
 + Shoutbox 
 + News 
 + Dialogues (personal mail) 
 + Avatars 
 + BB-tags 
 + Multilanguage interface
 + Theming (wap/web/touch) using templater Twig 
 + High speed and performance 
 + High flexibility in configuring 
 + Easy Scalability possibilities Site 
 + Modules 
 + Widgets 
 + User Roles 
 + Blocking Users 
 + Installations components via admin panel 
 + Many other