The XCB util module provides a number of libraries which sit on top of libxcb, the core X protocol library, and some of the extension libraries. These experimental libraries provide convenience functions and interfaces which make the raw X protocol more usable. Some of the libraries also provide client-side code which is not strictly part of the X protocol but which has traditionally been provided by Xlib.

The XCB util module provides the following libraries:

- aux: Convenient access to connection setup and some core requests.

- atom: Standard core X atom constants and atom caching.

- event: Some utilities that have little to do with events any more.

xf86-video-SiS is a SiS video driver for the Xorg X server. This driver supports SiS chipsets of 300/315/330/340 series.

XC-MISC Extension defines a protocol that provides Xlib two ways to query the server for available resource IDs.

xf86-input-mouse is a mouse input driver for the Xorg X server. This driver supports four classes of mice: serial, bus and PS/2 mice, and additional mouse types supported by specific operating systems, such as USB mice.

XFree86 Bigfont Extension contains header files and documentation for the XF86BigFontProto protocol.

This package provides modern, high-quality Xorg drivers for NVIDIA graphics cards.

Direct Rendering Infrastructure 2 Extension defines a protocol to securely allow user applications to access the video hardware without requiring data to be passed through the X server.

xlsfonts lists fonts available from an X server via the X11 core protocol.

Resize and Rotate Extension defines a protocol for clients to dynamically change X screens, so as to resize, rotate and reflect the root window of a screen.

xf86-input-keyboard is a keyboard input driver for the Xorg X server.

XEv creates a window and then asks the X server to send it X11 events whenever anything happens to the window (such as it being moved, resized, typed in, clicked in, etc.). You can also attach it to an existing window. It is useful for seeing what causes events to occur and to display the information that they contain; it is essentially a debugging and development tool, and should not be needed in normal usage.

Xmodmap is used to display and edit the keyboard modifier map and keymap table that are used by client programs running on X server to convert event keycodes into keysyms. It is usually run from the user's session startup script to configure the keyboard according to personal tastes.

Big Requests Extension defines a protocol to enable the use of requests that exceed 262140 bytes in length.

Virtual/offscreen frame buffer driver for the Xorg X server.

This package provides bdfresize, a command to magnify or reduce fonts in the Glyph Bitmap Distribution Format (BDF). It produces BDF output.

XAuth program is used to edit and display the authorization information used in connecting to the X server.

Resource Extension defines a protocol that allows a client to query the X server about its usage of various resources.

Print Extension defines a protocol for a portable, network-transparent printing system.

Xorg font encoding library.

Xorg Generic PCI access library.

Xcalc is a scientific calculator desktop accessory that can emulate a TI-30 or an HP-10C.

libXfont provides the core of the legacy X11 font system, handling the index files (fonts.dir, fonts.alias, fonts.scale), the various font file formats, and rasterizing them. It is used by the X servers, the X Font Server (xfs), and some font utilities (bdftopcf for instance), but should not be used by normal X11 clients. X11 clients access fonts via either the new API's in libXft, or the legacy API's in libX11.

This package provides the headers and specification documents defining the core protocol and (many) extensions for the X Window System.

xwayland-satellite grants rootless Xwayland integration to any Wayland compositor implementing the xdg_wm_base interface. This is particularly useful for compositors that (understandably) do not want to go through implementing support for rootless Xwayland themselves.