Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.

Documize - Enterprise-grade wiki and knowledge management platform

HelpDocs - Educate your users with a super simple knowledge base that’s built for teams just like yours.

HackMD - Fast and flexible, real-time collaborative markdown, inspired by Hackpad.

ScribeHow - Create step-by-step user guides, with a simple click

ReadTheDocs - Spend your time on writing high quality documentation, not on the tools to make your documentation work.