View selected 2013 US Census Demographics for US Zip Code Tabulated Areas (ZCTAs).
You can view the running application here, though if you see an error message that means that I have exausted my monthly quota at shinyapps.io. In that case you can install the application yourself by typing the following from an R console:
# install.packages("shiny")
library(shiny)
shiny::runGitHub("acs-zcta-explorer", "arilamstein")