A utility for downloading files
https://aria2.github.io

aria2 is a utility for downloading files. The supported protocols are
HTTP(S), FTP, SFTP, BitTorrent, and Metalink.

aria2 can download a file from multiple sources/protocols and tries to
utilize your maximum download bandwidth. It supports downloading a file
from HTTP(S)/FTP/SFTP and BitTorrent at the same time, while the data
downloaded from HTTP(S)/FTP/SFTP is uploaded to the BitTorrent swarm. Using
Metalink's chunk checksums, aria2 automatically validates chunks of data
while downloading a file like BitTorrent.