Thrift is a software framework for scalable cross-language services development. It combines a powerful software stack with a code generation engine to build services that work efficiently and seamlessly between C++, Java, Python, PHP, Ruby, Erlang, Perl and Haskell.
Thrift allows you to define data types and service interfaces in a simple definition file . Taking that file as input, the compiler generates code to be used to easily build RPC clients and servers that communicate seamlessly across programming languages.
Thrift is one of Facebook's core software engineering resources. It is used in various ways across many products, including: Search , Mobile , Posts , Notes , Feed , Platform . If you use the site, you've used Thrift.
Facebook Markup Language ( FBML ) enables you to build full Facebook Platform applications that deeply integrate into a user's Facebook experience. You can hook into several Facebook integration points, including the profile, profile actions, Facebook canvas, News Feed and Mini-Feed.
Facebook Query Language ( FQL) allows you to use a SQL-style interface to more easily query the same Facebook social data that you can access through other Facebook API methods (assuming your application has access!).