iOculus is a PHP web application framework (but not a CMS!). The targets of iOculus are simplicity, and high performance. It uses PHP4, XML, and systems/libraries such as PEAR and Smarty. The framework is object-orientated.
PhpSkel is web application framework. It based on Phrame (MVC), Smarty and PEAR libraries. Also there many additional classes useful in real projects. PhpSkel is stable and flexible solution because it was used in many projects since summer 2003.