HoDoKu - HoDoKu is a sudoku helper written in Java and available in English and German.
Minimal Sudoku - Minimal Sudoku is an easy to use, clutter-free classic sudoku game which is designed for iOS 7.
Yasminoku - Sudoku game and solver totally written in DHTML.
Simple Sudoku - Freeware Sudoku Puzzle Maker and Solver
USB Sudoku - A very small program for playing the original game of Sudoku.
NumberDrop - A uniquely challenging math puzzle game.