ReviewTrackers - Software that generates new customer reviews, engages your customers and lets you listen and...

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

Birdeye - #1 most trusted reputation and customer experience platform for local business

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.

Podium - Podium helps your business get more customer reviews, manage customer feedback, customer interaction, and online review management from one software.

Zendesk - Zendesk is a beautiful, lightweight help-desk solution.