sscaffold combines css rules from normalize.css, skeleton.css, and milligram into a single, reorganized, easy-to-use css file, with bugfixes and a few other updates and additions. It emphasizes sensible defaults and semantic HTML.

This library (not framework) looks like a good starter for many projects.

The single file is human-readable, commented, includes credits to original authors, and is designed to be easily customized.