HTML email Inline Styler
This is an awesome little resource for anybody who does email marketing. Since Outlook doesn’t allow background images in tables and services like Gmail strip out any CSS in the head of your HTML, all your CSS has to be done inline. You could write all that code yourself if you need the practice, or you could use The HTML email Inline Styler. It’s straightforward and simple interface means anyone can use it. Best of all (aside from it writing all that code for you) is that it tells you what problems you might have encountered and for what systems, platforms, services and devices. Oh, did I mention it’s free?