My team has an XWiki. It works well enough, and there are a number of plugins and things to get XWiki pages to update in vim or emacs through a Perl RPC library

My team has an XWiki. It works well enough, and there are a number of plugins and things to get XWiki pages to update in vim or emacs through a Perl RPC library. I don't like it as much as Confluence (paid), but it's at least syntactically the same. The Perl library you use for scripting is actually the Confluence library. Mediawiki is OK, but the granularity of access control isn't there for what you could need in the software world. The corporate overlords use Sharepoint, and also some Confluence. If you host all your OneNotes online, you can have OneNote sync them. That might be your quickest way to share your tribal knowledge. This is an obviously short term fix because otherwise every new employee will have to add N synchronized OneNotes. I haven't found a way to import a OneNote into XWiki short of printing to PDF and importing again.