Note: Library of Congress also offers a publicly available collection of Sanborn Maps.
Digital Sanborn Maps provides access to large-scale maps of American towns and cities, including information such as the outline of each building, the size, shape and construction materials, heights, and function of structures, location of windows and doors.
Policy Map is a web-based Geographic Information System that provides a simple mechanism for visualizing data from 2000s to the present. Available data includes demographics, home sale statistics, health data, mortgage trends, school performance scores and labor data like unemployment, crime statistics and city crime rates.