A LEGO version of HAL 9000, from the movie 2001: A Space Odyssey. All of the red and yellow parts can be replaced with any colour, without changing the outward appearance of the model.
That got us all thinking -- what would Andy have wanted for his homelab? What would our own spouses do if we suddenly weren't there? Who would close our Azure accounts? Who should get the PureStorage array? For those of us who are The Bill Payers, how would our spouses know which bill is paid by what bank account?
I put together an initial draft to answer these questions for my own wife, and then crowdsourced the rest. So many of my tech friends suggested stuff I hadn't thought of and I'm sure there's more. Initially, I was going to make it a gist, but a friend suggested putting it on GitHub which would make PRs possible.
open-source-rover - A build-it-yourself, 6-wheel rover based on the rovers on Mars!
The DIYLILCNC is a fully functional, open source 3-axis CNC that you can build with basic tools and parts that can be locally sourced. The idea is that you develop a 3D design in a CAD application, put feedstock into the CNC, and print your design to it, and it cuts and grinds away everything but what your design is supposed to be. Total cost of construction is about $700us. You can download the plans and DXF template files from the website for free (they have a CC-BY-SA license).
Open Ephys is a site that catalogues open source neuroscience hardware - EEGs, data acquisition boards, EMGs, and other bits of equipment that manufacturers historically never manufactured very well.