ArgenCities is a web app that delivers a Google Maps powered search of Argentinian cities. The tool displays useful city info such as weather using Forecast. It also features restaurants, accommodations, destinations and more, using accompanying pictures powered by Panoramio for additional description. The web app is a good tool for planning a trip, or as a day-to-day reference for tourism within Argentina.
Crowd.fm is an easy-to-use platform created to promote events online. It's been described by its founder Tekin Suleyman as "an amazing platform for getting events listed with a single click." The company provides the Crowd.fm API to provide developers integration options.
RESTful services that underpin many Web APIs today should follow design patterns that make any Web API a good Web API. Such design patterns are all about respecting HTTP protocol specifications, respecting good URI design principles, or taking the full advantage of underlying Web infrastructure for Web API's good performance and scalability. If you are interested in such practices or in a cutting-edge research that may impact the future of Web APIs developments, you should look into the series of workshops on RESTful Design.