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HelpCrunch Knowledge Base - Deliver instant answers to customers 24/7 with help articles
Feed.exileed.com - This service transmits your favorite social networks by RSS.
Stonly Knowledge Base - Interactive knowledge bases and help-centers
NewsBlur - NewsBlur is a personal news reader that brings people together to talk about the world.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.