Summary

A pair of these brackets can hold up to three of Plugable's 7-port USB hubs.

http://plugable.com/products/usb3-hub7bc
http://plugable.com/products/usb2-hub7bc

Screw them onto the top or bottom of your desk, and regain comtrol of your workspace!

Here's a bit more on the design:
http://plugable.com/2015/07/30/adventures-in-stackability-and-modularity