3
Internal wikipedia-like
(alien.top)
Knowledgebase is also a common keyword you might want to research!
A couple of self hosted options; you track, which includes a good knowledge base section. And mediawiki, along with many other wiki style foss projects.
A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.
For Example
We welcome posts that include suggestions for good self-hosted alternatives to popular online services, how they are better, or how they give back control of your data. Also include hints and tips for less technical readers.
Useful Lists