Xmind - Xmind is a brainstorming and mind mapping application.

UserTesting.com - Usability testing has never been easier. Get videos of real people speaking their thoughts as they use websites, mobile apps, prototypes and more!

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

Userbrain - Easy, fast, and affordable user testing for websites and prototypes.

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

userinput.io - Get on-demand feedback for your app, website or idea. Learn how to improve by hearing real opinions.