aria2 is a lightweight multi-protocol & multi-source command-line download utility. It supports HTTP/HTTPS, FTP, SFTP, BitTorrent and Metalink, etc.

SnapTube is an Android application that enables you to download YouTube videos to your mobile device.

Mediatap is an application to download movies, music, e-books to a smartphone.

uGet is a GTK based Download Manager for GNU Linux and Windows.

File Expert is an advanced file explore on Android. It manages files, photos, music, videos, docs and APKs efficiently on both local and Clouds.