Stonly Knowledge Base - Interactive knowledge bases and help-centers
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Document360 - Self-service knowledge base software focused on SaaS Products & Enterprise Software Projects.
HelpDocs - Educate your users with a super simple knowledge base that’s built for teams just like yours.
Papyrs - The easiest way to create a company intranet/team wiki
phpMyFAQ - phpMyFAQ is a world’s most popular mobile-friendly, feature-rich and open-sources FAQ software that uses PHP 5.