Please find below a number of resources we are happy to give away freely. Our only requirement is that you do not claim ip, ownership or use for commercial projects.
WordPress includes a number of suggested CSS rules to help the presentation of things like images and the alignment of text.
Websites by Mark are currently working on a new CSS framework.
SEO_WBM is an easy to use on page SEO plugin for WordPress, it is 100% white hat and will automatically adjust its advice as Google (or any other search engine) changes its algorithm.