Extension

Cython, short for Cython Language, was created by Greg Ewing in 2007. Cython is a programming language that makes writing C extensions for Python easier by allowing Python-like syntax with optional static typing for performance. Developers can access Cython through the official site: Cython Downloads, which provides source packages, installation instructions via pip, and documentation for Windows, macOS, and Linux platforms.

Emacs Lisp, short for Emacs Lisp Programming Language, was created by Richard Stallman in 1976 as the extension language for the Emacs text editor. Emacs Lisp is a dialect of the Lisp family and is primarily used for scripting, customization, and extending the functionality of Emacs.

FScript, short for FScript, was created in 2001 by Stephane Ducasse and colleagues as part of the Moose project at the University of Savoie. FScript is a scripting language designed for exploring, querying, and manipulating object-oriented systems, particularly Smalltalk and model-driven engineering environments. It is used in software analysis, reverse engineering, and interactive object inspection.

PHP, short for PHP: Hypertext Preprocessor, is a widely-used open-source server-side scripting language designed for web development and dynamic content generation. Originally created by Rasmus Lerdorf in 1995, PHP can be downloaded and installed for personal or business use via php.net/downloads.