aria2

Lightweight and easy-to-use download utility; it supports HTTP/HTTPS, FTP, SFTP, BitTorrent, Metalink and multiple sources; cross-platform.

curl

A tool and library for transferring data with URL syntax; supports a lot of protocols.

Deluge

A lightweight, Free Software, cross-platform BitTorrent client; a terminal curses interface, web interface and command line client can connect to a running daemon to manage torrent downloads.

lftp

“Sophisticated ftp/http client, and a file transfer program supporting a number of network protocols”; support for bookmarks and mirroring features.

rsync

Mirror directories across networked machines; handles diffs/changed files; works across SSH; plenty of parameters.

sitecopy

Synchronizes a local copy of a website with a remote copy on a server; does not use SSH/scp but FTP for file copy; useful when the remote server does not support secure copy.

stftp

Simple terminal FTP aims to be a “easy-to-use and unbloated client for the UNIX (and UNIX-like) console”.

Woof

Web Offer One File sets up an HTTP webserver to serve files from a given local directory; all the users connected to the network can see and download the files.

share-cli

Quickly share files from command line with your local network.

remote-share-cli

Quickly share files from your command line with the world.