Software that can create or view a layout of communities, highlight available/unavailable lots and choose from a selection of house models. From there you can view pictures, videos and text about the house models and plot of land. Plot landmarks and name streets. News scroller at the bottom of the map.
As a separate quote I would like a 3d model viewer for the house models and the ability to load furniture models into the house and organize them, much like the sims or something similar. The 3d model software will have to be linked to the above mentioned software and should be multi touch.