rTorrent is a text-based ncurses BitTorrent client written in C++, based on the libTorrent libraries for Unix, whose author’s goal is “a focus on high performance and good code”.

I am writing this page to learn more about rtorrent myself, and to become familiar with the program.
I currently only have experience with ruTorrent, a front-end web interface for rtorrent.

rtorrent & libtorrent wiki on GitHub
rtorrent on the Arch Wiki