I'm looking for some system to create documentation for my software. I'd like something with as many as possible of the following properties:
- I can install it on my own server
- Wiki-style editing
- I can create an export (PDF/Word doc/CHM/web site archive/sth. else) by just clicking a button or similar.
- Cheap/free
Is there such system out there? I've seen this question, but it is focused on turning doc-comment into documentation files, whereas what I'm looking for is more of a free-text system for higher level documentation.