The Facebook SDK for PHP enables developers to access the Facebook Graph API and use the Facebook Login from within PHP applications. Examples are provided that show how to use the SDK to retrieve a user's profile, post a link to a user's feed, and upload a photo to a user's profile.
Gowalla, Foursquare, Yelp, Facebook Places, the list goes on. There's certainly no shortage of methods to tell people where you are and what you're doing while you're there. Startup Whatser, built on the SoGeo API for location-based apps, has jumped into the ring with a different approach to check-in services: to be useful.
After holding off for months on an official API, popular photo sharing service Instagram has opened sign-ups for a public beta of its Instagram API. With it, developers can access the 300,000 photos uploaded daily by its more than 2 million users.
MEA Mobile's Printicular App powered by the Walgreens API has passed four million prints. Walgreens will be speaking at the I Love APIs 2014 conference that will be held in San Francisco September 9-10.