In an attempt to free more space on my retro games shelves, I have been finding these sorts of cartridge racks and printing them. Then I started making some. This is my Atari 5200 cartridge rack. It did free up some space on my shelves, but I ultimately decided to return my 5200 cartridges back to their universal game cases since 5200 carts don't have top labels so you can't see what games are there.

If you want to store you carts this way, here is an option for ya.