I've been playing around with a very easy, small-scale CMS for the last couple of weeks. It's called SEO CMS and is at the snappily-named free SEO website builder optimized web design CMS software (I'm not an affiliate or re-seller for this.)

I rebuilt a one-page site for one of my products into a more complete site using this software. You can see the result at The information organizer that works in 3D

It doesn't need any technical knowledge, and provides many styles and before committing yourself to appearance, you can click to see the result of each style when applied to your own material. It has a free version that links to the publisher on every page, but the version for a single website and no strings attached, which you probably want, is $60.

I was attracted to this by the easy set up and use. I know basic HTML but not much more, and I didn't have to use that knowledge at all, so it should be good for your users.

Argey