Argh! is an esoteric programming language in the spirit of Befunge, Brainfuck, and friends. It is a nice and simple language with two dimensional code-flow, a combined code/data array, an infinite stack, regular characters for all instructions, no strange braces or symbols, no unnecessary arithmetic operators (add and sub are all you need), and countless other features it doesn't have. The distribution includes interpreters for Argh! and Aargh! (an extended Argh! that is most likely Turing complete), the official specification, editing modes for emacs and vim, and lots of examples.
Arkanoid: Space Ball is an unusual and picturesque game with a futuristic atmosphere, modern techno-style graphics, dynamic gameplay, and an excellent soundtrack. The goal of the game is to clear a lot of platforms soaring in space while meteorites, spacecraft, and enemy guns constantly threaten your life. Numerous bonuses drop out from the broken blocks to help you to pass obstacles such as lasers, rocket launchers, and force fields. Its special features include horizontally oriented break block formation, moving and shooting bricks, and gravitational anomalies.
In Armagetron, you ride a lightcycle around the game grid. You can only make sharp turns of 90 degrees and a wall constantly builds up after you. Make your enemies crash into your wall, but be aware that they are trying to do the same to you. If you are fast enough, you may be able to trap them, but the only way to speed up your lightcycle is to drive close to the dangerous walls. Prepare for exciting strategic preparations followed by action-packed close combat!
AsItHappens is a real-time network statistics collector and grapher. It collects data from devices over a network via ICMP and SNMP and displays them on a graph, optionally storing collected data in a database for later retrieval. Collection types include network response, bandwidth usage, processor usage, memory usage, Cisco NBAR, and Cisco NetFlow. AsItHappens polls data in regular intervals, which can be in the order of milliseconds, to give immediate feedback on network performance, and it can also graph flow information from packet capture files. AsItHappens includes the Self Defending Network, a horizontal shoot-em-up based on collected graph data.
Ascal is a Gnome version of the board game Lasca (or Laska). Lasca is a game similar to Draughts, but with some enhancements. You can refer to the description in the help system of Ascal, or on Wikipedia. Ascal is for one or two players. You can undo moves, save and load games, etc.
Astwar is a ncurses based simple space shooter; two little ships (asterisks), each on one side of the screen, try to shoot each other. There is network support with several multiplayer options and user extension with Scheme (via Guile) to program the little ship to do some things automatically are in the works.