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:

#1: Milwaukee M12 Wall Mounts

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.

#3: Hex Bit Rack

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.