qBittorrent - Lightweight and open source torrent client that runs on all major platforms.
Bashupload - Upload files from command line to share between servers
Deluge - Deluge is a full-featured BitTorrent client for Linux, Unix and Windows.
FilePizza - Open source application used to transfer file via WebRTC and WebTorrent.
µTorrent - Looking for a torrent site to download movies, music and more? Choose from top torrent sites like The Pirate Bay, RARBG, 1337X, and dozens more. (October 2019)
BlackHole File Transfer - Blockchain-based file transfer. Designed for everyday use.