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.
I bought a 3d printer (Sidewinder X1) based on it's capacity to print up a 100mm cyclone for chip separation. Making that, and some dust collection fittings for my Kity 636 planer thicknesser (both .stl files available through thingiverse) have easily repaid the c.£150 I paid for the printer.
There are also loads of options for magnetic dust collection fittings, which make an amazing difference when you have one extractor and many machines.