CMS based on CodeIgniter [closed]
PyroCMS have a good set of features, and modular design so you can use it as a base to develop a website. The code is in github, so you can download the latest version from it directly with ease, if you have git installed.
The creator of this CMS, Phil Sturgeon is also a member here, so you can put your question about this CMS here, and hopefully he can respond it directly.