Elevate - Elevate is an award-winning brain training tool designed to build communication and analytical skills.
HoDoKu - HoDoKu is a sudoku helper written in Java and available in English and German.
Peak - Peak is the automated way to keep track of what everyone is working on.
Simple Sudoku - Freeware Sudoku Puzzle Maker and Solver
Brain Workshop - Brain Workshop is a open-source version of the dual n-back brain training exercise.
nsudoku - A Sudoku game made with ncurses.