Krusader is described as 'Advanced twin panel (commander style) file manager for KDE and other desktops in the *nix world, similar to Midnight or Total Commander' and is a popular File Manager in the File Management category. There are more than 50 alternatives to Krusader for a variety of platforms, including Windows, Linux, Mac, Xfce and BSD. The best alternative is Double Commander, which is both free and Open Source. Other great apps like Krusader are Total Commander (Freemium), QTTabBar (Free), Dolphin File Manager (Free, Open Source) and Midnight Commander (Free, Open Source).
Dolphin is a file manager for KDE focusing on usability. Has three view modes: Icon, Detail and it used to have Column View like in Finder (it is not available in current version due to problems with maintaibility). Supports FTP, SCP and other protocols. Highly configurable.
FreeCommander is an easy-to-use alternative to the standard windows file manager. The program helps you with daily work in Windows. Here you can find all the necessary functions to manage your data stock.
XYplorer is a file manager for Windows. It features tabbed browsing, a powerful file search, a versatile preview, a highly customizable interface, optional dual pane, scripting engine, and a large array of unique ways to efficiently automate frequently recurring tasks.
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!
Thunar is a new 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 and intuitive, and does not include any confusing or useless options.