Worker is described as 'file manager for the X Window System on UN*X with low requirements (basically only the X11 libraries). The directories and files are shown in two independent panels (similar to Midnight Commander)' and is a File Manager in the File Management category. There are more than 50 alternatives to Worker 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 Worker are Total Commander (Freemium), QTTabBar (Free), Midnight Commander (Free, Open Source) and Dolphin File Manager (Free, Open Source).
Total Commander is a shareware Orthodox File Manager (OFM) for Windows. Some features include a built-in FTP client, file compare, archive file navigation, and a multi-rename tool with regular expression support.
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!