State Decoded API

Hull ID Boat HIN Decoder

Decode the 12 digit HIN and check if it is valid. HINDecoder is used by many State DMV's and has been running for 7+ years.

NasaAPI

Get NASA's collection of asteroids and space pictures.

Numbers

An API for interesting facts about numbers. Provides trivia, math, date, and year facts about numbers. For example, "5 is the number of platonic solids", "42 is the number of little squares forming the left side trail of Microsoft's Windows 98 logo", "February 27th is the day in 1964 that the government of Italy asks for help to keep the Leaning Tower of Pisa from toppling over"

ADSBexchange.com

Data for Live Air Traffic and Flight locations via ADS-B/MLAT - This API for non-commercial, personal use only.

UK Air Quality

Provides Air Quality Data across the UK, updated hourly and provided by DEFRA

OneMap Singapore - Search

New OneMap is the authoritative national map of Singapore with the most detailed and timely updated information developed by the Singapore Land Authority. There are also many useful day-to-day information and services contributed by government agencies. 'OneMap Singapore - Search' is your most accurate search on Building names, Postal Code, MRTs, etc.

Quandl

Quandl has a vast collection of free and open data collected from a variety of organizations: central banks, governments, multinational organizations and more.

ATTOM Property

ATTOM Data Solutions provides premium property data to power products that improve transparency, innovation, efficiency and disruption in a data-driven economy. ATTOM multi-sources property tax, deed, mortgage, foreclosure, environmental risk, natural hazard, neighborhood, and boundary data for more than 155 million U.S. residential and commercial properties covering 99 percent of the nation’s population. A rigorous data management process validates, standardizes and enhances the data collected by ATTOM, assigning each property record with a persistent, unique ID — the ATTOM ID. The 9TB ATTOM Data Warehouse fuels innovation in many industries such as tech, real estate, insurance, financial services, government, and many more. ATTOM Data is for developers and organizations that need property data solutions to target customers, power their products, and drive innovation through data. From startups seeking to disrupt traditional industries to forward-thinking organizations looking to better understand and target their customers, property data is a powerful tool valuable for a variety of different use cases.