A stackable case for Zenacolor dual-tip acrylic markers. Print one, two, or three boxes and join them with the "joiner" piece: Box 4 holds 24 markers, Box 1 + Box 3 + a joiner hold 48, Box 1 + Box 2 + Box 3 + two joiners hold 72.
The holes have a small inset so a marker slides in and stays put once rotated slightly, and the blocker piece closes one side of a box so nothing slides through — just slide it in with the box vertical.
Unofficial accessory, not affiliated with, sponsored by, or endorsed by Zenacolor. Some links are affiliate links — I may earn a small commission at no extra cost to you.

A protective case for the AZDelivery HW-140 DC-DC buck boost converter, so the board can be handled and mounted without touching the electronics.
A remix of EduGomes' HW-140 enclosure with redesigned tolerances, added protection for the exposed parts, and reworked buttons and board retention.
Some links are affiliate links — I may earn a small commission at no extra cost to you.

A hardshell case for the Motorola Edge 60 Neo, printed in PETG or PLA. It keeps the phone reasonably slim and protects well against scratches — though it is not designed to absorb hard impacts.
Prints vertically with supports, already set up in the included .3mf file.
Unofficial accessory, not affiliated with, sponsored by, or endorsed by Motorola.

A custom mechanical keyboard keycap inspired by the ARC Raiders logo. Five separate parts — one main keycap body with recessed slots, plus four coloured inserts. Print the parts separately, press-fit the inserts into the keycap and secure them with a small amount of glue.
Designed for Cherry MX-compatible switches.
Unofficial fan-made design, not affiliated with or endorsed by Embark Studios.

Guitar foot rest

Keys hanger

Mostly Printed CNC - A project by V1Engineering

Wine and glasses rack

Magnetic markers holder for whiteboard. Uses 5x5x5 magnets, better if with a drop of glue

Mixed materials amplifier support.
First version was completely 3D printed, but I was not satisfied. So back to the garage with the first draft I had printed and some scrap wood :)

Magnetic wooden French-cleat hex t-keys holder, magnets are hiddend behind a thing layer of wood.
Finish was not perfect so I opted for some spray paint.
I like that there's no direct contact between the tools and the magnets, but I would suggest slightly bigger magnets if you want to try this approach.

3D printed magnetic plant pots

Wooden mini magnetic floating shelves

3d-printed parts for aluminum t-slot rails

Wooden hippo rattle toy