The Facebook Graph API is great and in one year has thoroughly upgraded Facebook's approach to its platform. The Graph API is much simpler than previous iterations of Facebook's APIs and Connection methods. Of course, with the simplicity of the Graph API, it's still easy to get overwhelmed by just how much information you can easily (with explicit and secure user permission, mind you) get access to and use in your apps. Facebook employee Simon Cross put together a handy Facebook Graph API Explorer to help you navigate the Graph API response content.
Web developers often have to work harder than mobile app developers to get information about their site visitors. This article will introduce you to the ipstack API, a service that provides users with geolocation, timezone lookup, language, currency and organizational identity.