Dolphin KDE
File Manager
File manager GUI
Double Commander
ForkLift 4
Manage your files quickly across local drives and remote servers with ease. ForkLift is a robust FTP/SFTP/WebDAV/Amazon S3/Backblaze B2/Google Drive/Rackspace Cloud Files client and a powerful and versatile file manager.
Keka
WinSCP
WinSCP is a popular free SFTP and FTP client for Windows, a powerful file manager that will improve your productivity. It supports also Amazon S3, FTPS, SCP and WebDAV protocols. Power users can automate WinSCP using .NET assembly.