libtorrent-rasterbar is a C++ library that aims to be a good alternative to all the other bittorrent implementations around.
It is a library and not a full featured client, although it comes with a working example client.

The main goals of libtorrent-rasterbar are:
* To be cpu efficient.
* To be memory efficient.
* To be very easy to use.

qBittorrent is a bittorrent client programmed in C++ / Qt that uses libtorrent (sometimes called libtorrent-rasterbar) by Arvid Norberg.