No mention of LIQUi|> (pronounced liquid) in this list. http://research.microsoft.com/en-us/projects/liquid/ MSR claims to have the most advanced / fastest quantum computer simulator.

As I understand, LIQUi|> is not publicly available. Is it?

I believe you are correct, so you cannot just hobby hack on it, but it you have a serious purpose I think the team will listen to you.

In any event "List of QC simulators" appears to be just that, a list, with no stipulation that it contains only open source software, etc.

another one that seems missing is this one http://www.quantumplayground.net which runs in a browser and has tutorials on how to write programs.

EDIT: spelling