Xmind - Xmind is a brainstorming and mind mapping application.
TapMeasure - Smart Augmented Reality Measurement
MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.
AirMeasure - Turn your phone into a ruler with the power of AR
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
FeetMeter - App to measure your feet and check your shoe size