Emacs Overview
GNU Emacs is a free, open-source, extensible text editor for Windows, macOS, and Linux, one of the oldest and most powerful editors in existence. Far more than a text editor, it is often described as a computing environment: nearly every aspect of its behavior can be customized and extended using its built-in Lisp dialect (Emacs Lisp), and a vast ecosystem of packages turns it into an IDE, email client, file manager, organizer (Org mode), and much more. It offers powerful editing, syntax support for countless languages, macros, and a famously deep feature set. It has a learning curve but rewards investment with near-limitless flexibility. The full offline installer bundles the application and installs without an internet connection. It runs in both graphical and terminal modes, and decades of community packages mean there is usually an extension for any task. This page links to the official GNU Emacs download.