Policymap is an online data and mapping application that gives access to over 15,000 indicators related to housing, crime, mortgages, health, jobs, demographics and education. Data are available at all common geographies (address, block group, census tract, zip code, county, city, state, MSA) as well as unique geographies like school districts and political boundaries. Data come from both public and proprietary sources. Many of the public files are available for download. Through PolicyMap, you can access all data in interactive maps, tables, charts, reports and through a unique analytic tool. This link is to the free version of the interface.