Title: elisp-Hacks
ClOMO (COBOL-mode)
Major mode for COBOL-sources (yikes!). Based on "como" by Andree Peters and Harald Weiss; hacked for xemacs by Azundris, plus various boni (interface to fontlock, outline-mode, LaTEX-Nassi-mode, HTML/RXML, and stuff).
The current version has several wonderful fixes by John Burgess that make it run both under emacsen and xemacsen, even on Windows.
If you have xemacs 21.4 or better, the menu will break unless you use this fixed for xemacs 21.4 version. Yes, they should be merged RSN.

YODL-mode
Mode (fontlock, really) for editing YODL-documents. (prerelease)

tinyFugue-mode
Mode (fontlock) for editing tinyFugue setup files. (very alpha)

MUSHify!
Extremely simple. Converts current text buffer to the format used by tinyMUSHes. (More MUSH-foo, including MUX In A Minute 2.)

unfill-paragraph
Extremely simple.
unfill-paragraph-azou turns the individual lines of a paragraph into one long one, eliminating any indent.
unfill-paragraph-mush transforms the individual lines of a paragraph into one long one using unfill-paragraph-azou, eliminating any indent. It puts the result into the cut-and-paste buffer, with an extra \\ in front and a newline at the end for easy pasting into a MUSH or MUX online game. It adds an empty line after paragraph unless there already is one, font-locks (highlights quotes and such) and places the point (cursor) there. This makes it useful both for cutting-and-pasting from the MUSH window (tinyFugue within a terminal in my case) to xemacs (and reformat it properly), and for reformatting your own poses for pasting them from xemacs to the MUSH.

Installation
To use a mode more conveniently, you may choose to put the following in your .emacs (examples for COBOL-mode):

(autoload 'cobol-mode "cobol")
;; to autoload the mode (from file "cobol")

(setq auto-mode-alist (cons '("\\.cbl\\'" . cobol-mode) auto-mode-alist))
;; to associate the mode with the file-extension ".cbl"

(speedbar-add-supported-extension "CBL")
;; tell speedbar (not for xemacsen) about the "CBL" extension

Patches against xemacs
Some patches against xemacs, like the tinting & shading patch for its text area, are available in a separate location.