Ready Reference Sources
Providing authoritative answers to all kinds of factual questions since 1938—first as a popular radio quiz show, then starting in 1947 as an annual almanac, and since 1998 on the Internet.
Since 1995, RefDesk is a free, and family-friendly website that indexes and reviews quality, credible and current web-based resources.
Free information about New York City
Free civics related information about New York City
New York City's annual exhibition of open data expressed in creative and tangible forms
