Xmind - Xmind is a brainstorming and mind mapping application.

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.

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

Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community

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

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