ROS stands for Robotic Operating System and features an open-source robotics middleware suite. ROS robots include a variety of different hardware systems from telepresence robots to awesome mobile manipulators. Using the powerful Robot Operating System you can build robots that see, sense, move around and more.
Unlike most restricted proprietary software, ROS allows you to develop add-ons and accessoires as your project requires. During the last years, ROS robot availability has been expanded. Find here ROS compatible Robots as well as parts.