What are some alternatives?
When comparing Transmission and qBittorrent, you can also consider the following products
Deluge - Deluge is a full-featured BitTorrent client for Linux, Unix and Windows.
BitTorrent - BitTorrent is a peer-to-peer program developed by Bram Cohen and BitTorrent, Inc.
Vuze - Vuze is a free BitTorrent client used to transfer files via the BitTorrent protocol.
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)
Tixati - Tixati is a peer-to-peer file sharing program that uses the popular BitTorrent protocol.
rTorrent - rtorrent is a BitTorrent client for ncurses, using the libtorrent library.