HelpDocs - Educate your users with a super simple knowledge base that’s built for teams just like yours.
statuspage - A simple self-hosted status page site with an API written in Django under the BSD license.
SkipFlag - AI knowledge base that builds itself from your communication
StatusPage.io - StatusPage.io is the best way for web infrastructure, developer API, and SaaS companies to get set up with their very own status page in minutes. Integrate public metrics and allow your customers to subscribe to be updated automatically.
phpMyFAQ - phpMyFAQ is a world’s most popular mobile-friendly, feature-rich and open-sources FAQ software that uses PHP 5.
UptimeRobot - Free Website Uptime Monitoring