Atlas of Surveillance by The Electronic Frontier Foundation - Public information about surveillance techniques used by police departments in North America.

Portraits of Population by Aman Bhargava and Vivek Matthew - 700+ archived charts from India's census, 1901-1991.

OldNYC by Dan Vanderkam - 200 years of NYC archival photos, arranged on a map of New York City.

80s.NYC by Brandon Liu and Jeremy Lechtzin - Street view photos of New York commissioned by the city in the mid 1980s.

Aeris - Realtime 3D flight tracker by kewonit - A 3D flight tracker showing the realtime positions of commercial flights, color-coded by altitude