Wiki Engines

[Larry Cook]

I'm looking for a wiki engine to try out internally with my eight-person team 
at work.  I'm willing to do my own research, but thought I'd ask for 
recommendations first.

I'd prefer something that I can just install and run without much or any 
configuration.  Just a standalone program would be fine.  I don't need any 
security, but would like revision history kept.

And of course, it should be OSS and run on Linux! ;-)

Thanks,
Larry