Community Questions for Confluence - Keep questions and answers in one place with an engaging, community-driven Q&A discussion forum, powered by Confluence

Netumo - Ensure healthy website performance, uptime, and free from vulnerabilities. Automatic checks for SSL Certificates, domains and monitor issues with your websites all from one console and get instant notifications on any issues.

Stack Overflow for Teams - Everything you love about Stack Overflow in a private space.

Question2Answer - A Q&A site helps an online community to share knowledge.

OSQA - OSQA is the free, open source Q&A system you've been waiting for.

Discourse - Discourse is an open source discussion platform built for the next decade of the Internet.