WikyBlog is a CMS/Groupware application written in PHP/MySQL that fuses collaborative editing features of wikis with user friendly publishing characteristics of blogs. MediaWiki derived wiki syntax, AJAX enhanced, UTF8 and extendable (google maps).
Risoluto - Simple Framework for PHP -
Risoluto is a framework for PHP. The concept is "simple and light weight". If you use a framework for the first time or looking for light weight one, Risoluto is good choice.