xc is a simple and handy substitute for sudo. It parses the /etc/xc.conf file, containing a list of identifiers, accesses, and commands. If an identifier (given as an argument to xc) matches the corresponding access (i.e., user or group), the related command is executed. The user can only see the identifiers he can execute, and the real command attached to the identifier remains invisible to him.
xcalib loads the 'vcgt'-tag of ICC/ICM color profiles to the X- server, in order to calibrate the user's display by tweaking the LUTs in the video card. Users need a profile which contains the 'vcgt' tag to achieve monitor calibration with the video card's LUTs. These profiles can be created with most commercial profile creation programs. For testing purposes, some profiles are added to the tarball.
The Xitnalta Content Management System (xcms) provides a virtual filesystem library to deal with content from different sources (a real filesystem, a database, etc.) and in different formats. Its goal is to provide yet another way to access and manage data both locally and over the Internet.
xcplay is an ncurses interface to XMMS. The UI is a clone of cplay, but using XMMS as a backend instead of console players, running either as a GUI-stripped daemon or on a virtual X server (Xvfb). Advantages over cplay include seeking for many more formats, detachment, unlimited instances, and console player independence.
xd3d is a simple scientific visualization tool designed to be easy to learn. It can plot 2D and 3D meshes, with shadowing, contour plots, vector fields, iso-contour (3D), as well as 3D surfaces z=f(x,y) defined by an algebraic expression or a cloud of points. It generates high-quality vector PostScript files for scientific publications and still or animated bitmap images. The distribution includes the graph plotter, xgraphic.