Free VMs of Windows to test older versions of IE
The VMs are designed for Virtual PC, which is of course only available for Windows.<p>There's a script called ievms that will automatically downloade those VMs and convert them for use with VirtualBox on OS X or Linux:<p><a href="http://xdissent.github.com/ievms/" rel="nofollow">http://xdissent.github.com/ievms/</a>