links for 2009-01-20 11 Useful Tools To Check, Clean & Optimize Your CSS File | MakeUseOf.com A bunch of very useful css tool to check clean and optimise the code. (tags: design css *-to-read) ClickZ – Stats Clickz – digital marketing site – illustrating trends and patterns in online usage. (tags: *-to-read market-research research marketing resources) PXtoEM.com: PX to EM conversion made simple. As it says on the box – px to em conversions made easy (tags: design css typography)