GNU Emacs is an extensible, customizable text editor—and more. (GPL)
Linux - FreeBSD - Windows - macOS
Kate is a multi document editor, based on a rewritten version of the kwrite editing widget of KDE, offering all the features of that plus a bunch of its own. (LGPL)
Linux - FreeBSD
Vim is a highly configurable text editor built to enable efficient text editing. (GPL)
Linux - FreeBSD - Windows - macOS
5 applications