LifeDigger - Evolving personal knowledge base
Support Hero - Educate your customers through self-help support
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
HelpSite - HelpSite is a simple service to help your setup the perfect support centre or help site.
TheBrain - TheBrain: The Ultimate Digital Memory
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.