Top Alternatives to Directory Opus

Total Commander is a Windows based file management program with the good plugin system.

FreeCommander is a freeware file manager with built-in FTP client, archive handling, multi-rename, wipe files and MD5 checksums.

File Explorer, previously known as Windows Explorer, is a file manager application that is included with releases of the Microsoft Windows operating system.

xplorer² (2xExplorer) is a dual-pane file manager for Microsoft Windows operating systems.

TotalFinder is a plugin for Finder.app which adds tabs like those in Google Chrome, dual panels similar to TotalCommander, and other improvements.

ASTRO File Manager is a powerful app for managing files and applications that lets you work with them directly on the cloud.

ForkLift is a file transfer software, It allows you to transfer files using FTP, SFTP, FXP, WebDAV, Amazon S3 and even Bluetooth.

Unreal Commander is a freeware file manager for Windows.

Amaze File Manager is an open-source file management tool that lets you explore all the directories on your Android device, move files and folders, rename documents, copy and paste files, and so on.

Solid Explorer is a powerful Android file manager featuring access to most popular cloud storages, root access and easy extensibility.

NexusFile is a feature-rich portable Windows Explorer alternative.

My Commander is a free multitab file manager for Windows.

Nomad.NET is a freeware orthodox file manager (OFM) for Microsoft Windows.

Anti-Twin is a small software application which compares files, i.e. it searches for duplicate or similar files on your hard disk drive.

fman is a dual-pane file manager for Windows, macOS and Linux.

Tux Commander is an opensource GTK2 file manager.

Root Explorer is a file manager for root users.

Marlin is a sleek and fast GTK3 file manager.

Just Manager is a multi-tabbed multi-pane file manager for the Windows.