Somebody modelled greyprints for a RasPi 4 case that looks like a miniature BeBox. A circuit board for implementing the blinkylights on the front can be purchased from OSHpark.
A collection of greyprints for Construx parts.
Greyprints for 3d printing a modular hard drive rack. Modular. Mount a bunch of standard PC hard drives vertically. Bolt some fans onto the side to blow air across them and keep 'em cool. Seems like this would be an ideal setup to use with some hot-swappable drive connectors.
Downloaded to Windbringer. Fab, rivet into Leandra's chassis to replace the awkward steel drive backet that requires pulling out all the cards.
Kit Space (formerly called Kitnic) is a registry of open hardware electronics projects that are ready for you to order and build. It could be described as a "Thingiverse for electronics". Click on any project to get further info, download the Gerbers and see the bill of materials.
Click once, order everything.
Open source greyprints for Braille polyhedral dice.
.stl files for the Vampire, a quadcopter drone the superstructure of which is fully 3d printable.
A peripheral for the RasPi 2 and 3 that implements a medical monitoring interface. Implements EKC, SpO2, pulse, blood pressure, and respiration.