I had to get another post in before the 6 month mark. And it just so happens I ran into this awesome tool that is quite handy in terms of testing code in multiple versions of Internet Explorer. In the past I've always used the IEDeveloper toolbar (or Spoons browser sandbox ^[1] before M$ got all copyrighty on them and made them remove it) and it's fairly adequate in allowing me to test the various versions of IE. However there have been times It's missed the mark or in one case wouldn't work at all with the portal I was trying to log into (IE6) So when I ran into this little beauty I was instantly captivated (as captivated as one can be when doing anything that has anything to do with IE). Behold the Internet Explorer Collection ^[2].
Maybe I'm just behind the times but this is amazing. Multiple standalone installs of different versions of IE. You can even install really really old versions like 1.x (I didn't but you can). I installed IE6, IE7 and IE8, I don't run windows 7 either at home or work so I can't install IE9.
To be fair I'm still in the test drive phase and haven't removed my IETester install yet but so far it's looking good. The only complaint I have is IE Developer Toolbar is only available in IE8, and while Developer Toolbar is not exactly firebug (but, it has gotten better with IE8) it's about all you have when troubleshooting an IE specific issue.
Before downloading read the comments on the download site. I mention it because they seem to be about 50/50 good vs bad. The software works for me so far on Windows XP Pro SP3, if anything changes I'll update this post.