Isanaki Sudoku 2.6b
Isanaki Sudoku is a free multilingual Sudoku and Wordoku Boards generator, solver, helper and printer.
The software supports 9 * 9 and 16 * 16 boards and generate boards with 6 levels of difficulty. It updates automatically the pencil marks in each cell of the board to show the remaining candidates. Isanaki provides help by explaining graphically how to solve next solution. Freeware guaranteed without spyware.