There are many places you can get a free private wiki. One place is WikiDot. The perk with this website is only people with certain log in information is able to view the wiki info.
The Wiki software can be purchased and placed on a private intranet.
Check the Minecraft Wiki. It has information there.
Free enterprise system
no.
It is a free site.
Wiki answers
Some can be free.
Nalanda Vishwavidhyalaya is the first free and private university in India.
I found it on www.myquestionpaper.com It is a free exam wiki that anybody can edit and use for exam to collaborate on question papers and answers
* Wiki answers will not give out information regarding private calls on cell phones due to the 'privacy act'.
yes wikia is free except the no ads for the wiki feature realeased on 2010
It is a high end private plane, the Gulfstream V. http://en.wikipedia.org/wiki/Gulfstream_V