The League have written a post on their typical RadiantCMS setup, including any extensions they use as standard. Also the web development company have explained how they have made their workflow process as simple as possible.
Our standard RadiantCMS setup
I recently finished working on a project at the web development company I work at which involved creating a PDF generation plugin for a CMS.
PDF Generation in Ruby on Rails
An interesting article by my web development company on how to get the most out of CSS frameworks without the need to sacrifice your principles of semantic markup and css.
Semantic 960.gs using SASS and Compass