Being a web designer myself, I know what a pain in the arse it is to get my code to work and show properly in all of the different browsers. I don’t think there really is anything that pains me more when it comes to designing a website for a client. This free program (Win32-PC) named IE Tester only covers Internet Explorer. So of course you will still need to test the other browsers. This really is a handy little app though.
Note that this is only an Alpha release, but it is in a working state. The author mentions some of the known problems and limitations. Still, a very neat idea. Anything that can give me a glimpse and help speed of the whole process of designing for browser compatibility is a winner in my book!
Some technology behind IE Tester – Visit Acid Tests
For more on Web Standards – Visit The Web Standards Project