A friend of mine was looking for a "simple" CMS which fit his needs without overwhelming him with loads of unneeded features. He stopped for CMSimple since it seemed pretty simple (it even states it in it's name! *coughs*) and solid. Boy, was he wrong.
He had a few problems adding "dynamic content" to pages so he stopped by the forums to ask what the correct approach to tackle the problem is.
The solution endorsed by the maintainers is pretty impressive, given the "maturity" and popularity of the project. Kudos!