QTTabBar Alternatives for Linux

muCommander is a versatile, open-source file manager designed for productivity across various operating systems. It offers a dual-pane interface for efficient file operations, built-in support for network protocols like FTP and SSH, and extensive customization options, making it a powerful tool for both casual users and power users who need advanced file management capabilities.

Dolphin File Manager is a free and open-source file manager for Linux, developed by KDE. It prioritizes ease of use and simplicity while offering a variety of powerful features for efficient file management, including network protocol support and a configurable interface.

Krusader is a powerful, dual-pane file manager for Unix-like operating systems, offering extensive file management capabilities, including archive handling, FTP support, batch operations, and advanced customization options. It's designed for users who need an efficient and feature-rich alternative to standard file browsers.

GNOME Commander is a robust, open-source two-pane file manager designed for the GNOME desktop environment. It offers a familiar dual-panel interface inspired by iconic file managers, providing efficient navigation and file management tasks with extensive features for both casual users and power users.

Tux Commander is an open-source dual-pane file manager designed for Linux systems, primarily utilizing the GTK2 toolkit. It provides a robust set of tools for managing files and directories efficiently, including support for network protocols like FTP and SFTP. While the project is discontinued, it remains a functional option for users seeking a classic dual-pane interface and core file management capabilities.