If you often work with the Raspberry Pi Zero/Zero W, and you want to make your projects stand out with a professional-looking, DIN-rail mountable case, then this Prototyping Board for Bud DMB-4774 boxes is a great option! Bud Industries makes all sorts of different boxes in different configurations; this particular box is mountable on a DIN rail, has spots for connector blocks to be plugged in, and also has a front faceplate that can be customized with controls, displays, and just about anything the user needs to interface with.
The board itself has a Pi Zero footprint in the middle, with plenty of protoboard-style connected rails to make interfacing with chips and voltage rails easy. Also thoughtfully included are mounting holes so you can positively attach the Zero to the board, and not rely on either soldered connections or headers alone.
A 2×10 IDC header breakout at one end of the board is another great feature. This would make interfacing with a front panel board much simpler, as 2×10 ribbon cables are easy to purchase and/or make. The Bud DMB-4774 is available from all popular distributors, and there are other boxes in the same range that are much bigger or smaller (though this board was made specifically for the 4774). Putting your project in a box like this can give it a nice, neat appearance while simultaneously protecting soldered connections and circuitry!