So I've tested my new site in latest version of IE, Chrome, Firefox, Safari, and Opera on windows 7. However I know I need to be able to support older browsers and on other operating systems.
I wondering how you guys handle this testing, as other than IE (Developer Tools -> can use IE9 IE8 and IE7) I don't know how to test older versions, I also don't know happen to have access to computers with other Operating Systems on them to use.