HoDoKu is described as 'Sudoku helper written in Java and available in English and German. Generate sudokus in five different and fully configurable difficulty levels. Solve them yourself (with help from HoDoKu's hint system) or let HoDoKu do it for you' and is an game in the games category. There are more than 25 games similar to HoDoKu for a variety of platforms, including Android, Windows, Android Tablet, Web-based and iPad apps. The best HoDoKu alternative is LibreSudoku, which is both free and Open Source. Other HoDoKu like games are Sudoku & Variants, Sudoku Challenge, Gauguin and Open Sudoku.