WackoWiki - WackoWiki is a light and easy to install multilingual Wiki-engine.
Slack News Feed - Get the top posts from every Slack chat you're in.
DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
Slinky - Your slack links — organized!
MediaWiki - MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia.
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.