Love the triple pane. I'd argue such a file manager is meant for people who prefer and are used to Vim shortcuts. I just tried Ranger. Got image preview and So

Love the triple pane. I'd argue such a file manager is meant for people who prefer and are used to Vim shortcuts. I just tried Ranger. Got image preview and Solarized theme working, but it does hang on previews it seems. For a GUI one, I can recommend fman (fman.io) as it uses the Sublime paradigm (shortcuts plus a command palette). It isn't FOSS though.