traggr - Smart tool for your team to track, manage and analyze customer feedback & feature requests in one central location. Keeps your customers' priorities in focus and makes them transparent to your team.
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
Ship - Fast, native issue tracking for software projects
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.
Canny - Canny helps you collect and organize feature requests to better understand customer needs and prioritize your roadmap.
Survicate - Collect feedback on your website and find out more about your visitors.