On ge-webdesign.de you will find modern and standard compliant templates for CMSimple:
The well-structured and commented HTML and CSS files makes it easy for "ambitious hobbyist" to customize the templates to their needs.
The templates from ge-webdesign.de are available under following License Conditions:
So these templates are usable for free on non-commercial sites, but on commercial sites for a small license fee.
CMSimple Templates by ge-webdesign.de »