Racket (formerly PLT Scheme) is a specific dialect of the Lisp language based on the Scheme branch of the Lisp family. It is suitable for implementation tasks ranging from scripting to application development, including GUIs, web services, etc. It includes programming environment, a virtual machine with a just-in-time compiler, tools for creating stand-alone executables, web server, extensive libraries, documentation for both beginners and experts, and more. It supports the creation of new programming languages through a rich, expressive syntax system.