Facebook Platform

[2] The platform offers a set of programming interfaces and tools which enable developers to integrate with the open "social graph" of personal relations and other things like songs, places, and Facebook pages.

For instance, one of the early games to reach the top application spot, (Lil) Green Patch, combined virtual Gifts with Event notifications to friends and contributions to charities through Causes.

[6] Tech blog Valleywag has criticized Facebook Applications, labeling them a "cornucopia of uselessness.

[8][9] Applications that have been created on the Platform include chess, which both allow users to play games with their friends.

[16] On November 18, 2009, Sony announced an integration with Facebook to deliver the first phase of a variety of new features to further connect and enhance the online social experiences of PlayStation 3.

On June 10, 2014, Facebook announced Haxl, a Haskell library that simplified the access to remote data, such as databases or web-based services.

[20] Starting in 2007, Facebook formed data sharing partnerships with at least 60 handset manufacturers, including Apple, Amazon, BlackBerry, Microsoft and Samsung.

These pages gain the functionality of other graph objects including profile links and stream updates for connected users.

[31] FBML set by any application is cached by Facebook until a subsequent API call replaces it.

[34] The UI framework for the mobile website is based on Xhp, the Javelin Javascript library, and WURFL.

In December 2012, the number of users signing into the site from mobile devices exceeded web-based logins for the first time.

Stanford University even offered a class in the Fall of 2007, entitled Computer Science (CS) 377W: "Create Engaging Web Applications Using Metrics and Learning on Facebook".

[37] In 2011, The Guardian expressed concerns that users publishing content through a third party provider are exposed to losing their web positioning if their service is removed; and the open graph could force connecting web presence to Facebook social services even for people using their own publishing channels.