If you've ever had to code together a complex HTML email then you know how painful it usually is. It's like taking a trip back to 1999 before the web discovered standards and everyone was still doing table-based design -- only with the addition of cumbersome inline CSS, and the challenge of dealing with scores of different mail clients and their divergent HTML rendering. Unless you do this every day the process can be unwieldy at best and a downright nightmare otherwise. For most of us, learning to code our own email is way more work then it's worth.
That's where Mail Designer, a new application from equinux, comes in; it provides a rich graphical email composer that goes far beyond what you'll be able to do in your preferred email client's editor. Mail Designer takes an iWork approach, focusing on a balanced feature set that makes it easy to use and hides all the technical bits in the background before sending your email to Apple Mail for delivery.