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.
TiddlyWiki - a non-linear personal web notebook
Kifi for Slack - Get links messaged on Slack in Google Search results
Confluence - Confluence is content collaboration software that changes how modern teams work
OneBar - AI-powered Q&A knowledge base for Slack teams