With 5 difficulty levels, the option to play one of 10 different Sudoku variants, intuitive interface, and all the functions right at your fingertips, Apex Sudoku is sure to be your favorite. Interrupted? Exit Apex Sudoku, and the puzzle is saved exactly as you see it! In addition to standard...
Neat Newton's cradle simulator. Drag and drop the spheres to create motion or use accelerometer. Demonstrates Newton's physical law of the conservation of momentum. Source: http://newtonscradle.googlecode.com