Roadmap - Collision avoidance for projects and people
HelpCrunch Knowledge Base - Deliver instant answers to customers 24/7 with help articles
Frill - A better way to collect customer feedback
Stonly Knowledge Base - Interactive knowledge bases and help-centers
Spaceli - Turn Google Docs into a knowledge base
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.