2d 10QCAD is a free, open source application for computer aided drafting (CAD) in two dimensions (2D). With QCAD you can create technical drawings such as plans for buildings, interiors,With Roll A Dice & Dice Roller, you can roll 4, 6, 10, or 20 dice. Have a specific number of dice to roll? A user-friendly interface will allow you to change the total number of rolls with just one click.