some example on ros about Mastering-ROS-for-Robotics-Programming-Second-Edition-master
#Mastering Robotics using ROS
chapter1 About ROS topics, services, messages, and actionlib
chapter2 mastering_ros_robot_description_pkg
chapter3 seven_dof_arm_gazebo
chapter4 seven_dof_arm_config
diff_wheeled_robot have a error of no joy package in the CmakeLists.txt