Rack-mount almost any small(-ish) device into almost any rack, create custom faceplates with ventilation or mounting points for various connectors and cooling fans, create custom rackmount enclosures for projects, and more.
WebMaka/CageMakerPRCG has 500 GitHub stars.
It currently ranks #35713 daily, #35952 weekly, #37135 monthly by momentum on Trending Repos; its best-ever rank is #6724.