Documize - Enterprise-grade wiki and knowledge management platform
Codezero - Collaborative Local Microservices Development
ReadTheDocs - Spend your time on writing high quality documentation, not on the tools to make your documentation work.
LeadMD - LeadMD is the revenue performance consultancy that cuts through the BS by making your vision actionable and your outcomes measureable
HackMD - Fast and flexible, real-time collaborative markdown, inspired by Hackpad.
Sirius - An open-source clone of Siri from UMICH