Open Source Document Management System | OpenKM

I saw some posts about the OpenKM 6.0 beta, but I can't find any download link.
Any idea where I can download the beta version?

Actually all our effors are in direction getting OpenKM profession 6.0 trial. Here there is a hard work still not done.

Meanwhile will not be finished we can not working on 6.0 release.

OK.
Thank you for the reply.