X.Org development aclocal macros

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

X.Org minimal distribution metaport

https://www.x.org/

Nesting X server from X.Org

https://www.x.org/

X.Org X server and related programs

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

X virtual framebuffer server from X.Org

https://www.x.org/

xorg protocol headers

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/trunk

Replacement for xbiff that handles popup window with mail header

Display PDF files and convert them to other formats

https://www.xpdfreader.com/

Command line utility for PDF viewers

The eXternal PacKer (XPK) library system

http://www.jormas.com/~vesuri/xpk/

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

https://www.jwz.org/xscreensaver/

Save your screen while you entertain your cat (for GNOME users)

https://www.jwz.org/xscreensaver/

Save your screen while you entertain your cat (for GNOME users)

https://www.jwz.org/xscreensaver/

WindowMaker dockapp to control XScreenSaver

http://xscreensaverapp.sourceforge.net/

Access X11 selection buffer from command line

http://BSDforge.com/projects/x11/xsel/

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

X Session Manager

Mono based web server

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

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

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

Tcl/Tk-based simple TeX interface

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

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

X11 program that displays images of various formats

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

Opensource MPEG-4 codec, based on OpenDivx

http://www.xvid.org/

Video mode tuner for X

Fast and functional image viewer

https://github.com/linuxmint/xviewer

Print out X-Video extension adaptor information

X Clients under Wayland

https://wayland.freedesktop.org/xserver.html

X11 server as Wayland client (development snapshot)

https://wayland.freedesktop.org/xserver.html

Dump an image of an X window

Window information utility for X

Image displayer for X

Extremely fast non-cryptographic hash algorithm

https://cyan4973.github.io/xxHash/

XKB keyboard layout indicator and switcher

https://sourceforge.net/projects/xxkb/

Magnify, rotate, mirror the image on the X screen