I ran across an article today discussing testing one’s website for cross-browser compatibility. The article mentioned several useful utilities that follow:

• BrowserShots - This site will take screen shots of your website with various operating system and browser installs. You can even provide detail down to screen size, color depth, java script version, java enabled and flash version. Appears to be a pretty good way to shotgun it and get feedback on your websites looks across a variety of scenarios.
• Virtual Machines – Microsoft has made available 5 different virtual machines that can be freely downloaded containing XP/IE6, XP/IE7, XP/IE8, Vista/IE7 and Vista/IE8. This is Microsoft’s Internet Explorer Application Compatibility VPC Image Pack.
• Expression Web SuperPreview – This handy tool allows you to compare your website side-by-side in different browsers with in-depth analysis of the elements contained in the site. Another handy feature is that you can overlay to the two sites to check for alignment differences.