This is a general, community wiki catch-all question to address non-specific "I need a CMS or Wiki that does x, y, and z..." questions.
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I have a list of features that I want for my website's Content Management System (CMS) - where can I find a [free] script that includes all of them?
The Webmasters FAQ outlines the nature of acceptable questions for this site: researching available solutions and providing anecdotal advice falls outside the purpose of this StackExchange site, so this type of question would be better-suited to chat or another discussion forum.
That being said, there are a variety of free and open source content management systems, as well as licensed software and paid services, which may meet your requirements.
Some of the most popular content management systems include:
All of the content management systems listed above are built around the concept of plug-ins which extend the application's functionality—there are many plug-ins, with new plug-ins authored every day.
Sites like The CMS Matrix and WikiMatrix can help you compare CMS's (but is best suited for looking for very particular combinations of requirements).
If you have researched content management systems and available plug-ins but cannot find anything that will meet your needs, you should consult a developer who can build something to your specifications either as a plug-in for an existing content management system or as a stand-alone application.
Just to add one paragraph if you are indecisive about what CMS to use..
Today every CMS is "easy" to use from the client's side. Most users are using CMS to post articles or publish galleries because you want to have them to modify their content. You just need to prepare territory for them.
Majority of users are using Wordpress. Some statistics show that 51% of all web pages are using Wordpress as their CMS. So basically, logical weapon of for creating something is wordpress. (As for statistic concerned)
There's great graph here on this link so you can get the wider picture, I'll just print screen one, and put link to the site
SOURCE: http://trends.builtwith.com/cms