Ask HN: What software do you use for your company knowledge base?
Also, is it any good?
Markdown docs in a git repo, throw gollum in front of it and you have a wiki anyone can browse and technical people can keep offline copies, even edit offline and push changes later.
We also use jira (i.e. quite a lot of information might be stored in deploy notes for particular issues), confluence (mostly product feature discussion/specs) and google-docs (mostly for meeting minutes), but for anything there that is not ephemeral (i.e. just this release/meeting/feature), we move it to our repo.
I don't like confluence, it's slow.
media wiki is ok, but it's hard to discover content.
Could be better