Commercial version of HackerDefender hxdef
Have heard about various "commercial" versions of Hacker Defender that are no longer being publicly advertised:
Silver Hacker Defender
Golden Hacker Defender
Brilliant Hacker Defender
Brilliant Hacker Defender Forever
I have heard that these versions have various levels of anti-detection techniques, etc. I am trying to do some testing of anti-rootkit programs and would like to see how effective they really are against some of these techniques.