aria2
Open Source
aria2 is a lightweight multi-protocol & multi-source command-line download utility. It supports HTTP/HTTPS, FTP, SFTP, BitTorrent and Metalink, etc.
YTD YouTube Downloader is an online youtube downloader.
uGet
Open Source
uGet is a GTK based Download Manager for GNU Linux and Windows.
Compare Orbit Downloader with alternatives
Compare aria2 and Orbit Downloader and decide which is most suitable for you.
Compare uGet and Orbit Downloader and decide which is most suitable for you.
Compare YTD YouTube Downloader and Orbit Downloader and decide which is most suitable for you.