Word Square - Sudoku, but with letters and words.
Ordinary Puzzles - A minimalistic puzzle game inspired by Picross and Sudoku.
SudoKoi - Your next favorite pastime, like Sudoku
Two Dots - Sharpen your puzzle solving skills with a challenging game of dot connection.
UsDoku - Play real-time multiplayer Sudoku.
PH Builds a Puzzle - A realtime, collaborative jigsaw puzzle.