If your workspace is like mine you probably have one or more extension cords running over it. I created this holder to have something that will get the cords off the desktop but keep the plug end of the cord within arms reach.
This holder slides onto the edge of the desk and provide a hook that will hold a cord with a 3-prong adapter (large), a single heavy duty cord or something else (single). It holds to the desk without any glue, screws, etc and can be attached/removed in a second.
I have created stl files for each of the 3 types for both 1/2 inch and 3/4 inch thick desktops.
If you need additional customization make and edit a copy of the model file for yourself on Onshape.com here: http://tinyurl.com/zv9yk6x