X.Org TrueType fonts

http://www.x.org/

X.Org Type1 fonts

http://www.x.org/

X.org libraries meta-port

https://www.x.org/

X.Org development aclocal macros

https://cgit.freedesktop.org/xorg/util/macros/

X.Org minimal distribution metaport

http://www.x.org/

X.Org X server and related programs

http://www.freedesktop.org/Software/xorg

X Window System unified protocol definitions

https://gitlab.freedesktop.org/xorg/proto/xorgproto

X.Org driver enabling use through an RDP session with xrdp

http://www.xrdp.org/

Graphical performance meter

https://www.pogo.org.uk/~mark/xosview/

Virtual note-pad system for your X11 desktop

https://launchpad.net/xpad

Virtual note-pad system for your X11 desktop

https://launchpad.net/xpad/stable

Replacement for xbiff that handles popup window with mail header

Display PDF files and convert them to other formats

https://www.xpdfreader.com/

Display PDF files and convert them to other formats

https://www.xpdfreader.com/

Display PDF files and convert them to other formats

https://www.xpdfreader.com/

Command line utility for PDF viewers

PostIt (R) messages onto your X11 screen

Utility for printing an X window dump

Property displayer for X

Primitive command line interface to the RandR extension

X server resource database utility

Multi-format document reader

https://github.com/linuxmint/xreader

Refresh all or part of an X screen

Save your screen while you entertain your cat

http://www.jwz.org/xscreensaver/

WindowMaker dockapp to control XScreenSaver

http://xscreensaverapp.sourceforge.net/

W3C XML Schema to C++ translator

https://www.codesynthesis.com/projects/xsd/

Access X selection from command line

http://www.vergenet.net/~conrad/software/xsel/

User preference utility for X

Root window parameter setting utility for X

Daemon that implements the XSETTINGS specification

https://github.com/derat/xsettingsd

Japanese shodou program for X based on Tcl/Tk

https://kozos.jp/myfreesoft/

X Session Manager

Mono based web server

https://www.mono-project.com/

X standard colormap utility

Watches the growth of files or directories

http://www.unicom.com/sw/xtail/

Multi-dimensional arrays with broadcasting and lazy computing

https://github.com/xtensor-stack/xtensor

Terminal emulator for the X Window System

http://invisible-island.net/xterm/

One or two player T*tris game

Tcl/Tk-based simple TeX interface

https://www.mat.univie.ac.at/~gerald/ftp/xtexsh/

Extended ncurses version of "Renshu-cho gyoretsu"

https://saahriktu.org/games.html https://github.com/Penguinum/xtgyoretsu-forked

X version of a simple but tricky board game

Outputs X window titles

https://github.com/baskerville/xtitle

Template library that supports other quantstack projects

https://github.com/xtensor-stack/xtl

Abstract network code for X

Triangles puzzle

http://www.tux.org/~bagleyd/puzzles.html

Game of skill similar to T*tris

Avoid running into walls, your own tail, and that of your opponent

Simple version for X Window of the famous card game Super Truco

Humorous Arcade game for X

https://xtux.sourceforge.net/

X11 program that displays images of various formats

http://www.trilon.com/xv/