Knights aims to be the ultimate chess resource on your computer. Written for the K Desktop Environment, it's designed to be both friendly to new chess players and functional for Grand Masters. It supports play against many opponents, including yourself, computer opponents, live Internet players, and against friends via email. It also sports highly customizable graphics and sound.
KStella is a KDE frontend to the Atari 2600 emulator, Stella. It currently supports the display of snapshots, labels, manuals, the configuration of individual game settings and of course, the ability to play games with just a click of the mouse. All these features are fully customizable to allow maximum flexibility.
bacKgammon is a backgammon program specifically written with the KDE in mind. It offers the opportunity to play backgammon games by using a convenient and intuitive graphical user interface. bacKgammon is the successor of KFibs, and supports all its features such as a graphical board representation, drag and drop with automated move checking, an intuitive interface to FIBS, and eliminates the need for typing and (learning) the commands of FIBS.
Kwest is an interpreter for Infocom and other Z-machine interactive fiction games. It is based on Frotz and tries to comply with standard 1.0 of Graham Nelson's Z-machine specification. Features include a fairly complete Z-machine interpreter, support for zblorb files and bibliographic information, support for color, styles, and timed input (sound and V6 pictures are not yet supported), input-editing facilities such as command history and tab completion (like Frotz), and more.