CodeIgniter has the most respected documentation available out of most of all available frameworks on the internet. According to CodeIgniter, It is a very powerful PHP framework with a very small footprint. This framework was built for serious PHP coders who like simple and elegant toolkit to create full-featured web applications.
Codeigniter is loosely based on MVC (Model-View-Controller) development pattern. This has been the part of Ellislab and is now being supported by codeigniter community through github. More information about codeigniter can be found at their website at codeigniter.com or on wikipedia.
Because of the ease of use of CodeIgniter, it's community is growing and has contributed with lots of libraries, models, plugins, tutorials, different tools and few fully functional and powerful Content Management Systems (CMS).
Some of the Codeigniter CMS that I found at the time of this posts are as follow:
Pyro CMSHome: - http://pyrocms.com
Fuel CMSHome: - http://getfuelcms.com/
Ionize CMSHome: - http://ionizecms.com/
Halogy CMSHome: - http://halogy.com/
Which Codeigniter CMS are you using? This website is based on Codefight CMS.
Have I missed any? Let me know and I'll include on next update.
If you are the owner of the listed CMS and want to publish about your CMS as a blog article here, then you can write and send article through contact page. It should be 300 plus words and must have atleast one Image. Please send properly formated and zipped article to info at our domain or through contact page.