9x9, 6x6 and Samurai Sudoku
Offers classic Sudoku and variants, as well as an online solver.

Query User
killer sudoku entered by user 20118200
samarai sudoku entered by user 11952187
samurai sudoku entered by user 3418755
samurai sudokus entered by user 14864108
samuri sudoku entered by user 12390644
sudoko samurai entered by user 20118200
sudoko samurai entered by user ditto
sudoko samurai entered by user ditto