ROS (Robot Operating System) is a free, open-source robot software framework initially developed by Willow Garage. And now under the maintenance of Open Robotics.
ROS (Robot Operating System) is a free, open-source robot software framework for robot software development, providing operating system-like functionality on a heterogeneous computer cluster.
ROS provides standard operating system services such as hardware abstraction, low-level device control, implementation of commonly used functionality, message-passing between processes, and package management.
It was developed by Willow Garage and is licensed under the BSD license. Newer packages now default to Apache 2.0 as the license.