Xmind - Xmind is a brainstorming and mind mapping application.
TapMeasure - Smart Augmented Reality Measurement
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
AirMeasure - Turn your phone into a ruler with the power of AR
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.
FeetMeter - App to measure your feet and check your shoe size