Good internal wiki software

Solution 1:

MindTouch (previously known as Dekiwiki) is pretty nice. We use it for our Intranet and our users seem to love it.

Solution 2:

Have a look at WikiMatrix, where you can compare them all by answering a few questions.

Solution 3:

We use the open source Screw Turn wiki. It is just about to have a new release (version 3) which will support both WISIWIG editing and markup.

It runs in on a windows platform under ASP.net in IIS.

Solution 4:

We successfully use Mediawiki internally and there's a way of replacing the normal editor with FCKEditor for WYSIWYG editing at http://mediawiki.fckeditor.net.

Not to mention a range of other extensions which may be useful.