Last fall I got an inexpensive 3D printer (Ender 3 Pro) and have been surprised at how it's made "shop life" better. What are your favorite things you've made for your shop? Here are mine:
Pictued above, this have 100% solved how to store these things. Just printed with PLA, they're quite strong and fit the tools perfectly.
#2: Tool Well Storage Bins
I made these to fit my bench's tool well. I had been using jars and other round containers but their shape wasted space and they didn't have internal divisions.
Nice way to keep my most often used bits out of a drawer and easy to find.
#4: 4" x 120mm Dust Hose Adapter
While not glamorous I use this every time I use my table saw.
Don't forget router templates! I've made so many of those now in various shapes and sizes that it almost feels like delayed reaction cnc routing. :)
A set of corner templates has been extremely useful for me. I found a minimum of five passes for the walls to maintain their shape over time.
Something like: https://www.thingiverse.com/thing:2438336/files