xscreensaver is a popular screen saver collection with many entertaining demos. It also acts as a nice screen locker.

The xvkbd displays a drawing of a computer keyboard in a window on the screen. Clicking on its keys sends the corresponding keystroke(s) to other X clients, as if typed on a physical keyboard.

This is useful for systems without keyboard hardware but with a pointing device, such as kiosk terminals or handheld devices with touch screens.

A limited number of keyboard layouts are available, as is dictionary completion. You can also use xvkbd to send a series of predetermined keystrokes from the command line, without displaying a keyboard at all.

xbanish hides the mouse cursor when you start typing, and shows it again when the mouse cursor moves or a mouse button is pressed.

A Wayland clipboard history manager. It can write clipboard changes to a history file, recall history with any picker which accepts input from stdin (including dmenu, rofi, and wofi), copy and past both images and text, and preserve leading and trailing whitespace.

ydotool is a Linux command-line tool that simulates keyboard input, mouse actions, etc. programmatically or manually.

slop (Select Operation) is a tool that queries for a selection from a user and prints the region to stdout. It grabs the mouse and turns it into a crosshair, lets the user click and drag to make a selection (or click on a window) while drawing a pretty box around it, then finally prints the selection's dimensions to stdout.

Xdpyprobe is a tiny C program whose only purpose is to probe a connectivity of the X server running on a particular DISPLAY.

Pixman is a low-level software library for pixel manipulation, providing features such as image compositing and trapezoid rasterisation.

xftwidth is a small C program for calculating the pixel widths of displayed text using Xft fonts. It is especially useful in scripts for displaying text in graphical panels, menus, popups, and notification windows generated using dzen. These scripts are often used in conjunction with minimalistic tiling window managers such as herbstluftwm and bspwm.

autocutsel tracks changes in the server's cutbuffer and clipboard selection. When the clipboard is changed, it updates the cutbuffer. When the cutbuffer is changed, it owns the clipboard selection. The cutbuffer and clipboard selection are always synchronized.

Xclip is a command line interface to the X11 clipboard. It can also be used for copying files, as an alternative to sftp/scp, thus avoiding password prompts when X11 forwarding has already been setup.

Wlsunset adjusts gamma based on day-night cycles on Wayland compositors that support wlr-gamma-control-unstable-v1. It is also known as a blue light filter or night light.

XSel is a command-line program for getting and setting the contents of the X selection and/or clipboard. Normally this is only accessible by manually highlighting information and pasting it with the middle mouse button.

XSel reads from standard input and writes to standard output by default, but can also follow a growing file, display contents, delete entries and more.

xsecurelock is an X11 screen locker which uses a modular design to avoid the usual pitfalls of screen locking utility design.

As a consequence of this design, you shouldn't use the usual screen locker service with xsecurelock. Instead, add a helper binary to your operating-system's privileged-programs field:

(privileged-programs
 (cons*
  (privileged-program
   (program (file-append xsecurelock "/libexec/xsecurelock/authproto_pam"))
   (setuid? #t))
  %default-privileged-programs))

This package provides terminfo files for the rxvt-unicode terminal.

gtk-session-lock is a fork of gtk-layer-shell to build screen lockers using the secure ext-session-lock-v1 protocol. This library is compatible with C, C++ and any language that supports GObject introspection files (Python, Vala, etc, see using the library below).

This is a simple menu for X11 designed for scripting and tweaking. It can optionally use some appearance settings from XSettings, tint2 and GTK.

wlrctl is a command line utility for miscellaneous wlroots Wayland extensions. At this time, wlrctl supports the foreign-toplevel-mangement (window/toplevel command), virtual-keyboard (keyboard command), and virtual-pointer (pointer command) protocols.

CopyQ is clipboard manager with editing and scripting features. CopyQ monitors system clipboard and saves its content in customized tabs. Saved clipboard can be later copied and pasted directly into any application.

Tofi is a Dmenu and Rofi replacement for wlroots-based Wayland compositors such as Sway.

xwhite is a command line tool for adjusting the colour balance of screen. It is based on xrandr's gamma correction and brightness adjustment. As such, it can only be used for X displays and not Wayland displays. It is typically used for tuning the color balance and color temperature. It has a similar function as redshift -P -g R:G:B -O temperature, but xwhite is more flexible in that it does not keep the white color fixed, suitable for setting the white color to an arbitrary balanced color.

The hsetroot command composes wallpapers for X. This package is the fork of hsetroot by Hyriand.

This is a simple plugin that lets the user run an alarm at a specified time or at the end of a specified countdown period.

Libxfce4windowing is an abstraction library that attempts to present windowing concepts (screens, toplevel windows, workspaces, etc.) in a windowing-system-independent manner.