At Vistaprint, we used MediaWiki, hired a dedicated librarian, and, most importantly, had a culture of documenting everything on the wiki. The last point is mos

At Vistaprint, we used MediaWiki, hired a dedicated librarian, and, most importantly, had a culture of documenting everything on the wiki. The last point is most important. Everyone in the organization _must_ adopt the mindset of checking the wiki first. If the information is not on the wiki, figure it out, and put on the wiki. I vaguely remember wiki articles even being a (minor) metric for annual reviews. At one point, Vistaprint tried SharePoint but we quickly went back to MediaWiki. At edX we have information spread between Confluence and Google Drive. Search is not ideal for either. Information sharing is not great.