Qemacs

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 QEmacs (for Quick Emacs) is a very small but powerful Emacs-like UNIX editor

 Author:   Fabrice Bellard 
 Homepage: http://bellard.org/qemacs/
 Family:   EmacsFamily LinuxEditorFamily
 Platform: UNIX, Linux, BSD
 License:  Open Source

Relatively lightweight clone of Emacs. Home page boasts that it is 150K, with the potential to compile a 49K version without some of the bloatware, however when I built it using the default "./configure;make" it was 240K. Performed well except for some messed up display updates when changing the display width (in a telnet text window - not using X which it also supports). --RonPerella?

Bellard wrote it to learn about Unicode rendering algorithms, text buffers manipulation and XML/HTML/CSS parsing.

Full screen editor with an Emacs look and feel with all Emacs common features: multi-buffer, multi-window, command mode, universal argument, keyboard macros, config file with C like syntax, minibuffer with completion and history.
Can edit files of hundreds of Megabytes without being slow by using a highly optimized internal representation and by mmaping the file.
Full UTF8 support, including bidirectional editing respecting the Unicode bidi algorithm. Arabic and Indic scripts handling (in progress).
WYSIWYG HTML/XML/CSS2 mode graphical editing. Also supports lynx like rendering on VT100 terminals.
WYSIWYG DocBook mode based on XML/CSS2 renderer.
C mode: coloring with immediate update. Emacs like auto-indent.
Shell mode: colorized VT100 emulation so that your shell work exactly as you expect. Compile mode with next/prev error.
Input methods for most languages, including Chinese (input methods come from the Yudit editor).
Hexadecimal editing mode with insertion and block commands. Unicode hexa editing of UTF8 files also supported.
Works on any VT100 terminals without termcap. UTF8 VT100 support included with double width glyphs.
X11 support. Support multiple proportionnal fonts at the same time (as XEmacs). X Input methods supported. Xft extension supported for anti aliased font display.
Small! Full version (including HTML/XML/CSS2/DocBook? rendering): 150KB big. Basic version (without bidir/unicode scripts/input/X11/C/Shell?/HTML/dired): 49KB.

 Screenshot: