Nolt - A fast & beautiful way to collect user feedback

hagrid - You work really hard to get people to your website.And they have so many things they want to ask!hagrid is a no-code widget, where visitors ask questions and you respond; a user generated FAQ that adds trust and lets you connect with your audience.

UseResponse - Open-source, self-hosted customer feedback software, live chat and helpdesk system that you can install on your server. Organize documentation using knowledge base and get feedback from social networks with centralized system

typedesk - A shortcut to all your canned responses

UserVoice - UserVoice integrates easy-to-use feedback, helpdesk, and knowledge base management tools in one platform that empowers users to speak and companies to understand.

Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.