JED is a text editor that makes extensive use of the S-Lang library. It is highly cross-platform compatible; JED runs on Windows and all flavors of Linux and Unix. Older versions are available for DOS. It is also very lightweight (meaning very parsimonious in its use of system resources), which makes it an ideal editor for older systems, embedded systems, etc. JED's Emacs mode is one of the most faithful emulations available.^[1]

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, sh, Perl, Python, IDL, DCL, nroff, more^[2]
• 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 GUI wrapper for X.
• "wjed" is a thin GUI wrapper for MS Windows.