Gazebo Robot Simulator Alternatives
Gazebo Robot Simulator is described as 'Gazebo simulates multiple robots in a 3D environment, with extensive dynamic interaction between objects' and is an app. There are three alternatives to Gazebo Robot Simulator for Linux, Windows and Mac. The best alternative is V-REP, which is free. Other great apps like Gazebo Robot Simulator are Webots and Marilou Robotics Studio.
V-REP is the Swiss army knife among robot simulators: you won't find a simulator with more functions, features, or more elaborate APIs.
Webots is a development environment used to model, program and simulate mobile robots. With Webots the user can design complex robotic setups, with one or several, similar or different robots, in a shared environment.
Marilou Robotics Studio is a modeling and simulation environment for mobile robots, humanoids, articulated arms and parallels robots operating in real-world conditions that respect the laws of physics.