Marlin is a new GTK3-based file manager for Linux, pretty slick and fast.
Unlike most other file managers Marlin has included the so called "Miller columns" view.
Last commit 2013-04-16. See https://bazaar.launchpad.net/~marlin-devs/marlin/marlin-0.5/files
Replaced by Pantheon (the Elementary file manager.)
Marlin itself was a great idea, dead now these nearly 10 years. I don't think you can install it on anything past the equivalent of Ubuntu 14.04
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