Hitori is a small application written to allow one to play the eponymous puzzle game, which is similar in theme to more popular puzzles such as Sudoku.
It depends on GTK+ 2.13 and Cairo 1.4, and has full support for playing the game (i.e. it checks all three rules are satisfied). It has undo/redo support, can give hints, and allows for cells to be tagged with one of two different tags, to aid in solving the puzzle. It has support for anything from 5×5 to 10×10 grids.
Please report any bugs to me via my contact page.
You can download the tarball, or get the SVN branch:
svn co http://svn.gnome.org/svn/hitori/tags/V_0_2_1
Get it from GNOME SVN:
svn co http://svn.gnome.org/svn/hitori/trunk