Planet Sudoku
Play millions of free Sudoku puzzles online for kids to experts. Sudoku puzzles like 9x9, Samurai, 4x4, 6x6, 8x8, 12x12, 16x16, 20x20 and 25x25.
4 Alternatives To Planet Sudoku
Color
Generate, visualize, and document accessible color palettes
Griddition
Griddition is a challenging numbers puzzle where you must fill a grid with numbers, Sudoku-style.
Yasminoku
Sudoku game and solver totally written in DHTML.
nsudoku
A Sudoku game made with ncurses.