yafc: The best command-line FTP client that nobody's ever heard of. Local caching, tab completion, bookmarking, SFTP, and other generally awesome stuff.
clex: Full-screen file manager for command-line junkies. Configurable directory display, smart name completion, enhances the command line without seeking to replace it.
clex's approach to file management is by complementing the command line; you can generally use it as a pure CLI and it stays out of your way unless until you need to find or select a path. Every action you perform remains on the command line, clex merely makes it easier to quickly build commands. Compared to clex, Midnight Commander (like Norton Commander before it) feels like an attempt at a graphical file manager for the terminal, where the command line is almost an afterthought.