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

Xmind - Xmind is a brainstorming and mind mapping application.

Product Pains - Giving users a louder voice to help teams build better products.

MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.

Nolt - A fast & beautiful way to collect user feedback

FeatureMap - FeatureMap story mapping, simple and effective realtime collaboration and collective intelligence tool.