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
SurveyLab - Professional online survey tool - best survey software for the best price - Satisfaction Surveys, NPS, Market Research, Online Survey Creation and real-time reports.
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.
Marketing Optimizer - Optimize conversion rates, increase lead-to-close ratio, and resell leads easily. Includes complete WordPress integration.
Survicate - Collect feedback on your website and find out more about your visitors.
Zoho Desk - Industry's first context-aware Helpdesk Software