KaGez-Production aims to make game developing under Linux easier. Tutorials and examples, reaching from simple console applications (non- graphical) to OpenGL games, are available, as well as tools like Image-Viewers, and 3D-Model viewers. All applications will be made for Linux only, most graphical items will work with GTK+/GNOME.
LibSudoku is a Java library for writing applications that deal with Sudoku number riddles. It contains methods for parsing numbers into convenient data structures, manipulation and information gathering, output to text and HTML, as well as some rules for solving given Sudokus. It was developed in a test-driven manner using JUnit test-cases.
Sudoku Sensei is not a Sudoku solver, but an "explainer". It can list the logical steps taken. It can generate new Sudokus and rank their difficulty. It supports not only 9x9 grids, but MxN, samurai, or any layout you can describe with the board editor. It has a GUI, manual, tutorial, and examples.
The Z-machine Preservation Project is a Java implementation of the Z-machine (Java version >= 5 is required) specification. This Z-code interpreter can be run either as a standalone application or as an applet within a Web browser. It runs Interactive Fiction created by Infocom as well as those compiled with Inform, and targets all existing story file versions. Features include saving the game state, multimedia support (graphics, sound effects, meta data), colored and styled text, undo, and timed input as well as support for different languages. Games in the Inform 7 release format are supported as well (Treaty of Babel specification).
libpuz is a C library implementing the .PUZ crossword file format. It allows users to read binary and text PUZ files and create binary PUZ files openable by Across Lite and other crossword programs. Also included is a (mostly) complete specification of the file format and checksum routines, in case you want to implement PUZ in a language other than C.