February 19, 2009 6:09 PM | oranda
Kakuro Nichiyo is a freeware implementation of the kakuro numbers puzzle. Similar to crossword puzzles, you are given clues about the sum of the numbers that are found in any given row and column, and from this you must deduce what number appears in each entry on the grid.
This game also features a fairly robust solver and a puzzle creation utility.
Versions for Linux and Mac can be found on the game's download page.