idea.informer - Idea Informer is a idea forum similar to uservoice or getsatisfaction.
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
Nolt - A fast & beautiful way to collect user feedback
GetSatisfaction - Get Satisfaction is the leading customer engagement platform that helps companies build better relationships with their customers and prospects, through the best online customer community.
Fider - Fider is an open source, cross platform and free to use customer feedback platform for companies...
FeatureMap - FeatureMap story mapping, simple and effective realtime collaboration and collective intelligence tool.