Here list of necessary features that exist in Double Commander, but were missing in other file managers I've tried: Dolphin → Spacefm → Pcmanfm → mc → Ranger → Caja → fman

• Integration with OS.
  • Open with respects system settings
• Two panel layout
  • Most logical layout for file manager
• Support Mouse back and forward buttons
  • Sometimes I feel lazy and want use mouse.
• Single instance mode
  • Hate when there is a clutter of multiple open windows. Tabs were invented for that.
• Search as you type filter
  • Extremely useful feature. When you start typing, only files that match filter are shown. Saves a lot of time.
  • Options → Keys → Letters → Quick Filter
  • Options → Quick Search Filter → Uncheck all Exact name match
• Custom actions:
  • Even if you hide toolbar, you can bind buttons to hot keys
  • Options → Toolbar → New Button
• It even has command palette!
  • Options → Keys → Hot Keys → bind do_AnyCmCommand to some key combination
• Integration with Fish shell
• Possibility to show thumbnails and quick view.
  • How you work with photos without thumbnails?
• Show file progress for long operations
• Native working with archives
• Files are blinking when updated by other app

Recommend to read article about Less Known Features

#Tip