The extensible self-documenting text editor.
GNU Emacs is an extensible, customizable text editor—and more. At its core is an interpreter for Emacs Lisp, a dialect of the Lisp programming language with extensions to support text editing.
Why people like Emacs
Add a one-liner

Companies using Emacs
Emacs integrates with

Emacs's Features
  • Content-sensitive editing modes, including syntax coloring, for a variety of file types including plain text, source code, and HTML.
  • Complete built-in documentation, including a tutorial for new users.
  • Full Unicode support for nearly all human languages and their scripts.
  • Highly customizable, using Emacs Lisp code or a graphical interface.
  • A large number of extensions that add other functionality, including a project planner, mail and news reader, debugger interface, calendar, and more. Many of these extensions are distributed with GNU Emacs others are available separately.

Explore other Build, Test, Deploy tools that are known for: