This list has been merged into the main LiveCD List here: http://www.livecdlist.com/index.php?pic ... sort=&sm=1
Because of licensing issues, Windows ISOs may never be legally free for download. That does not mean they are not available or popular, check out the Build-Your-Own post for the community development of Windows LiveCDs. This list will be for commerical versions.
Windows PE - http://www.microsoft.com/licensing/programs/sa/support/winpe.mspx
BartPE - http://www.nu2.nu/pebuilder/
(if you want a free Live CD with FULL NTFS support, check out LinuxDefender http://www.bitdefender.com/bd/site/presscenter.php?menu_id=25&n_id=58)
This one doesnt really seem to fit anywhere, but it appears to be really useful. It's full of many different bootdisks, including a hard drive utils, dos boot disks, and a few linux ones.
Ultimate Boot CD - http://www.ultimatebootcd.com/