Sudoku Mania is an opensource java project created by Robert Odell and is licensed under GPL.

The goal of Sudoku Mania is to create a customizable and fun to play sudoku game that will run on a wide range of operating systems.

Sudoku Mania is currently being developed on a KDE Linux machine and has been tested under Linux, XP, Vista, and Windows 2000. Sudoku Mania should work fine under Apple, BeOS, Solaris, or any other operating system with Java6 installed.
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Change Log:

Version 0.3.0 03-21-08 Major version change Key Features include ->   New look/New icons New  API Themes->Games->Layouts->Styles Extensions In game help Installers for multiple operating systems Version 0.2.5 10-06-07 Different game styles Samurai Sudoku Hyper Sudoku Jigsaw Sudoku Diagonal checking Resizable. Better game loading. Version 0.2.4 08-26-07 Added Piemonteis and Napulitano language packs (Provided By Sabine Cretella.) Reworded the Espanol language slightly. Changed some resizing code to better display different languages. Created a new Sudoku Mania icon. Bug Fixes -> Games saved prior to this version may not load if saved under a different language.  Games are now loaded by index rather than  by name.  Version 0.2.3 08-19-07 Added Localizing and the ability to add language packs. Renamed a few menu items slightly. Changed the Sudoku jar file from Sudoku0.2.x.jar to Sudoku.jar Bug Fixes -> Play button is no longer show when viewing the Start Page durring non active games. Version 0.2.2 07-22-07 Added print capability and Sudokus To Go Printing Added new Theme API tags (mainly for printing) Made all the Theme API tags and attributes case insensitive Changed the About Dialog Bug Fixes -> Shortcut keys for menu items work now (some have been renamed). Version 0.2.1 06-25-07 Added "Create Game" capability Optimized the puzzle solver algorithm  Changed the skill level code  Able to place the number picker on the top or bottom Many minor tweaks  and changes Bug Fixes -> Index out of Range Error when loading the default theme after a theme with a greater number of indexes Theme Loader would not open if the theme folder was a folder that does not exist Version 0.2.0.1 06-21-07 Version 0.2.0 was released as an "unintended" alfa build 06-20-07 and quickly replaced by 0.2.0.1 Complete rewrite of code for better expandability. Key Features include ->   All the features of Sudoku 1 New game generator 4 Skill Levels Save & Open Games Redo/Undo Moves Hints Timed games with Pause/Play New Theme Engine to allow third party xml sudoku themes Posted game on SourceForge http://sourceforge.net/projects/sudokumania Version 0.1.3 – 0.1.4 05-15-07 (Sudoku 1 Classic) 0.1.3 Added Small “Cheat” code to edit start, closing, & winning messages. 0.1.4 Adjusted 0.1.3 code. Version 0.1.2 03-17-07 (Sudoku 1 Classic) Added Icons to Tool Bar and Menus. Better control for changing and deleting numbers Adjusted Skill level logic from 01.1.  Bug Fixes -> Skill Level menu item check marks now show accordingly when the skill level is changed by the Skill Level tool bar combo box. Version 0.1.1 03-10-07 (Sudoku 1 Classic) First Functional Release to beta testers. Key Features include -> 3 Skill Levels New Game & Reset Game Options. Notes “Maybes”. All Questions, Comments, Bug Reports can be sent to Robert Odell at vbrobert01@yahoo.com