JED is a text editor that is heavily extensible by the S-Lang programming language and library. It is available for all major operating systems, among others. JED's extensible nature allows for many plug-ins or extensions, which are called 'modes' in JED and emacs, ranging from programming language-specific keybindings to primitive web browsers. JED's git repository receives irregular updates ranging from months to weeks in between.
Features From the JED homepage: Color syntax highlighting on color terminals Code folding support Drop-down menus on all terminals and platforms Emulates editors Emacs, EDT, WordStar, Borland, Brief Extensible in the C-like language S-Lang, making the editor highly customizable Can read Texinfo (GNU info) files from within JED's info browser A variety of programming modes (with syntax highlighting) are available including C, C++, Fortran, TeX, HTML, Bourne shell (sh), Perl, Python, IDL, DIGITAL Command Language (DCL), nroff, more Edits TeX files with AUC-TeX style editing, BibTeX support Asynchronous subprocess support, allowing one to compile from within the editor Built-in support for the GPM mouse driver on Linux console Abbreviation and dynamic abbreviation modes 8-bit clean with mute/dead key support Rectangular cut/paste; regular expressions; incremental searches; search replace across multiple files; multiple windows; multiple buffers; shell modes; directory editor (dired); mail; rmail; ispell; and much, much more. Variants: "jed" is the name of the console version, whether for the Windows command-box, or for any Unix-like console. "xjed" is a thin graphical user interface (GUI) wrapper for X Window System (X). "wjed" is a thin GUI wrapper for MS Windows.
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Jed on Windows A collection of S-Lang scripts (modes) contributed by JED users "RED Project", aka "Revisited jED" jednotes instructions for compiling on various platforms], including instructions to get it working on Minix3.