http://makezine.com/projects/building-a-simple-arduino-robot/

This Arduino robot had the capability to move and detect obstacles in its way, after detecting the obstacles it would find an alternative route.

 

http://www.instructables.com/id/Make-A-Simple-Bidepal-Humanoid-Robot/

This robot has a design that allow it to walk, the design its built upon allows the robot to do multiple moments and motions some people have programmed it o kick balls in to miniature goals.

 

http://lifehacker.com/build-a-kickass-robot-arm-the-perfect-arduino-project-1700643747

This is a robot arm that can extend, rotate and grab small objects this is all controlled with the classical wii controller.