Re: Site Documentation

As far as ColdFusion goes-- there's CodexWiki by Luis Majano, but it's not really maintained in it's old state any longer (more about that in a sec).

There's also Canvas Wiki by Ray Camden, but I've never used it and I don't think it's produces a full site for you.  (http://canvas.riaforge.org/)

Regarding CF CMS's, Mura and ContentBox are going to be your big players like Adam said.  They're both good, but I'm personally involved in ContentBox so I'll tell you to use that one although I'm totally biased   Seriously though-- if you just want to make pages which represent your docs and nest them together, both CMS's will probaly work. 

Now, back to CodexWiki-- Luis has moved it from Transfer ORM to Hibernate and turned it into a ContentBox module so you can simply create a new page in the CMS and instead of entering HTML via CKEditor, to choose Wiki markup as the renderer and you can enter Wikipedia-styled markup which is rendered into HTML when the page loads.  If this ContentBox module sounds nice, there's two catches

1. Luis hasn't gotten around to releasing it.  Bugging him and saying "hey, I'd like to use that module" might help
2. Last I heard, he was considering making it a commercial module.  That means it would cost money, but I don't think it would be much.

If you really want to use Wiki markup, but don't want to use the CodexWiki Module, write your own.  ContentBox is extremely etensible via CFML and a load of interception points in combination with rendering plugins.

If you don't care about wiki markup, and you're fine creating your documentation in good 'ole HTML, then forget the previous three paragraphs and just eeny meeny miny mo and pick a CMS (as long as it's ContentBox)

Neither CMS's allows for non-logged in users to edit which won't be an issue of you don't want a public Wiki. Both CMS do have theming support etc so you can make it look like what you want.  A plus for ContentBox, is the entire CMS is written as ColdBox modules, so if you're using a ColdBox site, you can drop them right in and map a URL path to point to the CMS.  Play with them and see what fits you well.

ContentBox

http://www.gocontentbox.org/

Mura

http://www.getmura.com/