Qualtrics - Qualtrics is the most trusted research platform, helping brands make crucial business decisions. From surveys to insights to action.
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
Retently - Measure and Improve Customer Satisfaction.
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.
NiceJob - Get more reviews and build an build an awesome reputation with NiceJob.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.