HoDoKu - HoDoKu is a sudoku helper written in Java and available in English and German.
NumberDrop - A uniquely challenging math puzzle game.
Simple Sudoku - Freeware Sudoku Puzzle Maker and Solver
Math Master - Brain Quizzes - Math Master is a free math quiz game designed for all ages!
nsudoku - A Sudoku game made with ncurses.
2048 - Play 2048 Game Online. Join the numbers and get to the 2048 tile!