Gears simulator - Version 1.3 The simulator helps in the design of mechanical systems including gear meshes, friction wheels and belt and chain drives. The components are placed on a flat workspace. Several components can be placed on a single axis, leading to a third dimension. Detail, profile and 3D views give a comfortable viewing of different aspects of the system. Texts and images can be printed or exported to other applications for modification. They can be also included in other documents created by the user. The simulation shows the transitory and steady-state operation of the mechanical system, with the detail of the components motion or displaying the number of full rotations completed by each axis. The most relevant properties of the mechanism are always shown (power, speed and torque) in a report bar. This software is mainly addressed to high school teachers and students because it is simple and easy to use. The learning time to start using in a efficient way the simulatorm is really short, due to the graphical menus, status bars, examples of mechanical systems, mouse use and a complete help system. Configuration options are useful for the personalized use of the simulator.