Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
statuspage - A simple self-hosted status page site with an API written in Django under the BSD license.
HelpDocs - Educate your users with a super simple knowledge base that’s built for teams just like yours.
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.
YUNO - YUNO is a web data driven company focussed on solving customer challenges in web data discovery and extraction space.