Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
HelpNDoc - What is HelpNDoc ? Easy to use yet powerful help authoring environment which can generate various documentation formats from a single source.
Salesforce Service Cloud - Service Cloud integrates customer service with social networks and provides a self-service customer portal and knowledge base system.
Dr.Explain - Dr.Explain software is a help file authoring tool.
Sitecore - Sitecore A/S has produced the Sitecore content management system since 1999.
CHM Editor - Best solution to edit CHM files