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

Zinrelo - Zinrelo is an enterprise-grade loyalty rewards platform designed for the needs of mid to large businesses, offering a comprehensive solution to boost customer engagement, repeat sales, and revenue that maximizes customer loyalty.

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.

CashStar - CashStar is a provider of prepaid commerce solutions for the world's top retailers and restaurants.

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

Swagbucks - Swagbucks is a loyalty program that offers individuals rewards for engaging in various activities. Users can earn reward points for performing Internet searches, purchasing items from affiliated vendors, or completing polls.