Documize - Enterprise-grade wiki and knowledge management platform
HackMD - Fast and flexible, real-time collaborative markdown, inspired by Hackpad.
ReadTheDocs - Spend your time on writing high quality documentation, not on the tools to make your documentation work.
Dokit - The solution for disseminating know-how: work instructions, procedures, knowledge base, documentation techniques, product support, wiki enterprise.
Twake - Be more productive with Twake : the collaborative work platform to organize and manage all your projects on a single platform.
Widget-Board - Visual planning, curating and productivity tool