support for ClearCase version control system in GNU Emacs
vimrc-mode.el for emacs. It's completely not acceptable for 20+ years later, there is not even a mode for editing vimrc files for emacs.
A brand-new powerful major mode for editing verilog sources in Emacs.
Display MSDN Library via emacs-w3m on Emacs.
A retro fighter game made in response to Word War vi <http://wordwarvi.sourceforge.net/>
z390 Mode is a GNU Emacs and XEmacs mode for editing s370,s390,z900 asm files.