A robust text editor capable of achieving whatever it is the writer wishes. It supports a plethora of programming languages and other faculties of text editing. Yet its advantages do not stop there. If one wishes to delve into the wizardry of Emacs, they can use it for email, web browsing, organizing ones life and so much more. With all these factors pertaining to the sovereignty of Emacs, only one question remains. What is stopping you from beholding its power?
Ranked in these QuestionsQuestion Ranking
Pro Total customizability
Customizations can be made to a wide range of Emacs' functions through a Lisp dialect (Emacs Lisp). A robust list of existing Lisp extensions include the practical (git integration, syntax highlighting, etc) to the utilitarian (calculators, calendars) to the sublime (chess, Eliza).
Pro Keyboard-focused, mouse-free editing
Emacs can be controlled entirely with the keyboard.
Licensed under GNU GPL.
Pro Works in terminal or as a GUI application
You can use Emacs' command line interface or graphical user interface.
Pro It's also an IDE
You can debug, compile, manage files, integrate with version control systems, etc. All through the various plugins that can be installed.
Pro Self documenting
Pro Great documentation
With 30+ years of use the Emacs documentation is very thorough. There are also a lot of tutorials and guides written by third parties.
Fully compliant GNU-emacs is available on many platforms, and they all understand .emacs configuration files.
Pro Mini buffer
You can pass complicated arguments in the mini buffer.
Pro Vi keybindings through Evil mode
Evil mode emulates vim behaviors within Emacs. It enables Vi users to move inside the Emacs universe.
Pro Rectangular cut and paste
Emacs can select rectangularly.
Pro Visual selection and text objects with Evil
Evil is an extensible vi layer for Emacs. It provides Vim features like Visual selection and text objects.
Pro dabbrev-expand (Alt-/)
Dynamic word completion.
Pro Lisp customizations
With lisp customization, any behavior of Emacs can be changed. Update with pre-release patch can be also applied without recompiling the whole Emacs.
Pro GTK+ widgets support
Pro Support multi-line editing, multiple frame, powerful paren, crazy jumping style
Review the "Emacs Rocks" video.
Pro Helm plugin adds even more power to Emacs
Pro Has been widely used for a long time
Con Learning curve is long
While it's better than it used to be, with most functions being possible through the menu, Emacs is still quite a bit different from your standard editor. You'll need to learn new keyboard shortcuts.
Con A lot of jokes in this serious software
Con Chorded keyboard combinations can be baffling
For example, for navigation it uses the b, n, p, l keys. Which for some people may seem strange. But don't worry, you can change it.