Meet the JR2 mobile manipulator: a versatile autonomous robot with an omnidirectional base that can pick items and performs other tasks using its 6DOF robotic arm. The arm has a max payload capacity of 5 kg when completely extended. You can mount finger servo grippers and other end effectors to do more with this robot.
JR2 has a max speed of 3 m/s. It is based on ROS. This video shows it in action.