Survicate - Collect feedback on your website and find out more about your visitors.

Influitive - Influitive helps companies increase customer lifetime value and accelerate sales with the power of their own customer advocates. Inspire your customers to stay longer, share their experiences, and attract new business.

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

Higher Logic - Private, secure online communities that stimulate conversation and ignite engagement.

UserReport - Free online usability surveys with demographic information. Detailed click tracking for websites and feedback button for online user forum. Easy signup.

Discourse - Discourse is an open source discussion platform built for the next decade of the Internet.