collaboration server

I want to setup a collaboration server, and I found openfire which, I think, is free. I tried to install in on a Fedora linux box, but I kept getting errors. When I would try to run the service I would get something like "job for openfire.service failed", I looked in the log, and ran systemctl and systemctl had something about "openfire.service  failed openfire is an xmpp "
so I googled these things and really didn't find much.
So I started thinking. Does anyone know of other collaboration servers? I saw Zimbra, but I think I have to pay for it.
I even tried to install openfire on a windows 10 pc, but still had problems, and it wouldn't start.
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JeffBeallAsked:
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sumeshbnrCommented:
Have a look at http://www.zarafa.com/ ,alfresco ,www.liferay.com/
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JeffBeallAuthor Commented:
thank you.
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