Programs: graphical environment

Unix

Display Server
Xorg
wayland
Video Drivers
mesa
ati
nvidia
intel
Remote Drivers
X11vnc
x2go	excellent remote control linux
nomachine
Utilities
light	change screen brightness
xbacklight	change screen brightness
redshift	low-contrast, adds red hue to screen at night
transset-df	make windows transparent
Linux Themes
xdotool	simulate keypresses
xbindkeys	bind keypresses within X
xrandr	change resolution

MacOS

xquartz

X11 server for OSX

Windows

xming

X11 server for windows