A free app for Android, by Ghost Squared.
The Ghost Commander File Manager app allows you to manage your files on a local or remote computer, and also lets you access network shares, such as FTP, SFTP, SMB, WebDAV, Drive, BOX, Dropbox, Google Drive, and more.
Ghost Commander is designed to be a complete file manager for the Android platform, including access to local and remote storage, network shares, and the built-in command-line interface. It also provides you with an option to use the built-in command-line interface to manage your files, and you can even add your own command-line commands.
Ghost Commander supports the standard file management operations: copy, move, rename, create, delete, and search. You can also create and manage ZIP archives.