statuspage - A simple self-hosted status page site with an API written in Django under the BSD license.

ProProfs Knowledge Base - ProProfs Knowledge Base is a cutting-edge knowledge management software that assists businesses to reduces support tickets by self-help and create online manuals, guides, wikis, documentation, FAQs and more.

UptimeRobot - Free Website Uptime Monitoring

Docular - Docular keeps your knowledge base healthy by automatically sending notifications to relevant team members about articles that need to be kept up to date and relevant.

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.

Kbee - Create a wiki in 5 minutes Kbee turns your Google Drive folders into a fast, searchable wiki for you and your team.