VisualRuler - VisualRuler calculates the size of objects using your camera and a card as a reference.
AirMeasure - Turn your phone into a ruler with the power of AR
iruler.net - Online ruler in actual size - cm & inches.
FeetMeter - App to measure your feet and check your shoe size
SketchAR - Start drawing easily using augmented reality
Measure 3D Pro - AR tools to measure the world.