Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
DriftBot - A chatbot for your knowledge base
HelpDocs - Educate your users with a super simple knowledge base that’s built for teams just like yours.
Faqbot - Build your chatbot for FAQ, sales and lead generation automation.
phpMyFAQ - phpMyFAQ is a world’s most popular mobile-friendly, feature-rich and open-sources FAQ software that uses PHP 5.
Codetree - You can manage your entire development process through GitHub.