3Doku (for Mac OS X) - 1.3

3Doku brings the traditional Sudoku game to the third dimension. In a 9x9x9 cube, 27 Sudoku schemas intersect one another along the three axis. Every 9x9 bi-dimensional schema must be solved keeping in mind that every single cell belongs to the selected schema and also to the other two placed on the orthogonal planes. With 4 difficulty levels and 4 initial values distributions you can customize your game and have every time a new exciting challenge to solve.

Version 1.3 now when 'Show Hints' is enabled, you can manually mark certain values as "impossible" from the Notes Editor panel.