Searching good article system

Hello,

a client of me wants to have a simple homepage where he can bring
information with pure text and pictures to his visitors.

The problem is that he has no expirience about html, javascript and so
on and even making a homepage whith a graphical editor is to hight for him.

So Iam searching for a cms system or something else who`s mainpoint is
making articles. So Iam installing him the system and he only has to
write his articles and bring them online.

Does someone knew a good system (open source prefered) which is good for
this pourpose (php and mysql is available)?

Thanks for all answers.