It is a product from Bluelounge and it is called CableDrop. They are well designed clips that can be put anywhere.
Place the CableDrop Cable Clips on your desk or wall. CableDrop gently grasps your power and peripheral cords so they do not fall off your desk every time you unplug your laptop.
The clips are designed to grasp the cable while you can still move them freely. Very nice. They are yours for $9.99 (6 clips, in different color variants).
See some more examples on how to the clips below.