This is a very simple NES and SNES cartridge stand that I designed to display cartridges quickly and to prevent them from falling over. I work at a retro game store and we like to display our NES games label out, and this prevents them from falling every time we open the showcase. This stand will also work for Genesis games and jewel case discs, but newer DVD style cases are a little tall for it.
Super easy and fairly quick print. Print flat side down obviously, I find that a raft works best.
I knocked this up in Microsoft 3D Builder on Windows 10 in about 20ish minutes. It's got slightly larger tolerances to accomodate both NES and SNES cartridges no problem.