OrthoGraph Architect 1.0
the author of this app says:
OrthoGraph Architect supports floor plan sketching and measurement on-site using a PDA. The measured drawings are shown in real time. Measured rooms or graphical parts are ordered into a structural view. Floating islands, or ghost layers, help users attach rooms to one another. The system supports Leica Disto A6/D8 via bluetooth. Default output formats of OrthoGraph Architect are 2D and 3D DWG and PDF, but other formats are supported as well.