A few improvements into 2021; everyone needs a desk foot hammock : r/battlestations
Uplift Under Desk Hammock
DIY: Make your own laptop hammock, for a dollar | Ars Technica
Under the Desk Foot Hammock
Amazon.com: CONRAL Foot Hammock Under Desk, Adjustable Desk Foot Rest Hammock for Office, Under The Desk Hammock for Feet Suitable for All Types Table Desk, Included Hooks : Office Products