Web Development Cheat Sheets

I found a website with a load of links to downloadable web development "cheat sheets" (external link). These are simple pages that you can print out and use as references whilst programming or designing. They can be pretty handy tools and they are free (as in beer)!

Personally, I tend to whip out one of my SitePoint books (external link) for a quick reference because they are right by my desk.