HelpCrunch Knowledge Base - Deliver instant answers to customers 24/7 with help articles
MediaWiki - MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia.
Slab - Slab is a knowledge hub for the modern workplace. We help teams unlock their full potential through shared learning and documentation. Slab features a beautiful editor, blazing fast search, and dozens of integrations like Slack, GitHub, and G Suite.
TiddlyWiki - a non-linear personal web notebook
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Confluence - Confluence is content collaboration software that changes how modern teams work