HEATKEYS

Mashape is a frustration-free online storefront for developers who want to distribute or consume an API of any kind of service

This site includes lots of information that is time and date related, such as yearly and monthly calendars, countdown counters and the world clock which shows current time in cities all over the world.

Free and open access to the world’s most comprehensive collection of data on developing economies. Browse, map, graph, or download data by country, topic on over 4,000 indicators. Available in English, Spanish, French, and Arabic.

ProgrammableWeb.com keeps you up to date with web mashups and APIs: what

A complete destination for your app, game & web development needs. Free resources, tools, design inspirations, latest development news, tips & more. Windows Phone and Windows Store app development resources

By searching through public APIs, developers can save time and energy, easily finding the APIs (software components) they need to quickly create and deliver an application on any platform (Mobile, Web, etc).

Provides world time zone database download and API access.

Weather Underground provides weather information for worldwide locations, including current conditions, hourly forecasts, radar and satellite maps. Specialized weather products include severe weather alerts, hurricane tracking, ski and sports weather...