SBL, a GIS/Geomatics company out of Kochi, India has a case study on a area of land in Nigeria where they produced 0.25m DTM output from UAV aerial image data for a real estate company. I am not sure which software they used, but they created point clouds from the imagery, produced the DTMs and had a quick turn around according to the case study. This is a approach I have mentioned for parts of the US, but cannot be produced until the FAA finishes the flight rules as early as September 2015.
Also, this follow up to other UAV posts with the United States being left behind while the FAA is working on approval as early as September 2015, 13 months away. Joe Francia of Directions Magazine talks about the delay and the need for the FAA to dot every i and cross every t.