HoDoKu - HoDoKu is a sudoku helper written in Java and available in English and German.
GCompris - Educational Game for Children 2 to 10 years old.
Simple Sudoku - Freeware Sudoku Puzzle Maker and Solver
GENIUS MAKER - The Genius Maker is a Mathematics and science education software from Golden K star.
nsudoku - A Sudoku game made with ncurses.
Get Sudoku - Get Sudoku is an interactive sudoku solver.