1940s NYC is described as 'Between 1939 and 1941, the Works Progress Administration collaborated with the New York City Tax Department to collect photographs of most buildings in the five boroughs of New York City. In 2018, the NYC Municipal Archives completed the digitization and tagging of these photos' and is a Map service in the travel & location category. There are three alternatives to 1940s NYC, not only websites but also apps for iPhone and iPad. The best 1940s NYC alternative is WhatWasThere, which is free. Other great sites and apps similar to 1940s NYC are The Clio and HistoryPin.