Free PHP open-source easy-to-use cms opinions needed
I am wanting to know if there is an actual free php mysql open-source easy-to-use content management system, which I can provide to my clients from now on. The cms must have lots of modules, something like the size of Joomla's extensions. I have clients which use Joomla and find it too hard to use. I don't think they are computer/internet savvy people. I have seen Drupal and Wordpress, and don't think I can provide those to my clients.
Would love to hear from a user's perspective, not from a designer/developer perspective, even though it would help for me as a designer to have an easy-to-use cms. Please provide a website link to the cms with your opinion. Thanks in advance.