FreeCommander is described as 'Dual-panel manager with tabbed interface, built-in viewer, ZIP/RAR/7z archive support, folder sync, batch rename, search and customizable shortcuts' and is a very popular File Manager in the file management category. There are more than 100 alternatives to FreeCommander for a variety of platforms, including Windows, Mac, Linux, BSD and Android apps. The best FreeCommander alternative is Double Commander, which is both free and Open Source. Other great apps like FreeCommander are Total Commander, Files, Spacedrive and Dolphin File Manager.
Thunar is a modern file manager for the Xfce Desktop Environment. Thunar has been designed from the ground up to be fast and easy-to-use. Its user interface is clean, intuitive, and customizable. Thunar is fast and responsive with a good start up time and directory load time.
Q-Dir makes your files and folder easy to manage. Fast and easy access, with an amazing Quadro-View (4 panes) technique. You dont have to renounce the usual, Drag and Drop, all Views, and other functions of your system. No!
Explorer++ is a free file manager for Windows. Available on Windows XP and above, it features the same familiar interface as Windows Explorer, while introducing several enhancements and improvements for a much richer file browsing experience.
Far Manager is a program for managing files and archives in Windows operating systems. Far Manager works in text mode and provides a simple and intuitive interface for performing most of the necessary actions:
Multi Commander is a multi-tabbed file manager and is an alternative to the standard Windows Explorer. It uses the very popular and efficient dual-panel layout.
Sigma File Manager is a free, open-source, quickly evolving, modern file manager (explorer / finder) app for Windows and Linux.
xplorer² is a desktop file manager combining the simplicity of Windows explorer with the speed and efficiency of traditional dual pane file managers.
Krusader is an advanced twin panel (commander style) file manager for KDE Plasma and other desktops in the *nix world.
Tablacus Explorer is a tabbed file manager with Add-on support.
Tabbed interface Add-on support Customizable association, menus, keys, mouse gestures, alias Completely Portable, No installation required Multiple language and Unicode support Open source .
muCommander is a lightweight, cross-platform file manager with a dual-pane interface. It runs on any operating system with Java support (Mac OS X, Windows, Linux, *BSD, Solaris...).
Brings iconic 3D Cover Flow file browsing to macOS, includes dual pane navigation, Quick Look integration, sidebar access to volumes, instant file sorting, context menus, type-ahead search, familiar Finder-like interface, and open source availability.
Commander One is dual-pane file manager for OS X created in Swift, which enables you to manage your files in the best possible way.
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Multi Commander has great thumbnail views of my images and videos. I can configure it very nicely to suite my preferences. I like how it opens very fast too.