Every web designer and developer probably have bad memories with Internet Explorer. And this is mostly because the browser compiling (or used to do so) CSS properties differently compared to the standards.
IEcss.com is a website which helps us to better understand the reasons behind this incompatibility. It shares a chart of user agent style sheets (CSS styles that are applied by default) for the major versions of Internet Explorer; IE6, IE7, IE8, and IE9 Platform Preview. The chart includes values for almost every CSS property and they can be downloaded per browser.
IETester is a free web browser allowing you to browse websites with the JavaScript & rendering engines of IE8 beta 1, IE7 IE 6 and IE5.5 on Vista and XP, as well as the installed IE in the same process. You can also find a very nice tool for Internet Explorer named Debug Bar which includes a toolbar and a development bar + a IE JavaScript debugger named Companion.js inside the same website.
Browsershots makes screenshots of your web design in different browsers. It is a free open-source online service created by Johann C. Rocholl. When you submit your web address, it will be added to the job queue. A number of distributed computers will open your website in their browser. Then they will make screenshots and upload them to the central server.
