Xpuyopuyo is a Tetris-like game in which the object is to match four or more blocks of the same color. Multiple matches are worth more points, and result in rocks being dumped on the opponent. It supports human-human, human-AI, AI-AI, or network game play, and a number of gameplay options including themes and music. The game also features AIs that can learn to play strategically.
xremote is a simple tool that lets you grab the mouse and keyboard of another machine and control them with your local mouse and keyboard. It creates a form of remote control of other machines. All mouse- and keyboard-actions on the local machine are forwarded to the remote display.
xrick is a clone of Rick Dangerous. Written entirely in C, it relies on the Simple DirectMedia Layer library and has been ported to Linux (its primary target). Way before Lara Croft, back in the 1980's and early 1990's, Rick Dangerous was the Indiana Jones of computer games, running away from rolling rocks and avoiding traps in places from South America to a futuristic missile base via Egypt and the Schwarzendumpf castle.
Xrmap is a program running under X that can interactively display portions of the Earth, using the huge CIA world vector map. It is based on an earlier console utility 'rmap'. It features political boundaries, major and minor rivers, glaciers, lakes, canals, etc. The map remains accurate under a very large zoom factor, which can possibly exceed 100. Spherical, rectangular, Mercator and Miller projections are implemented, and all features can be interactively set from the GUI.
XScoop provides the ability to quickly determine which underlying X libraries were statically linked into an application, even when the source is not available. XScoop parses an executable, looking for matches on a subset of sample keywords that may identify the library being used. It does not produce absolute results, and instead supplies a report with key-hits which represent the likelihood that a particular library is present in the binary.
Xscorch is a clone of the classic DOS game "Scorched Earth". The basic goal is to annihilate enemy tanks using overpowered guns. Players can purchase weapons and accessories to defend their tank, and they can attack enemy tanks by adjusting the angle of the tank's turret and the firing power. Xscorch supports gameplay with humans and computer AIs, and network gameplay is in development.