What are some alternatives?
When comparing Bitford and PicoTorrent, you can also consider the following products
dottorrent-gui - An advanced GUI torrent file creator with batch functionality, powered by PyQt and dottorrent.
qBittorrent - Lightweight and open source torrent client that runs on all major platforms.
Transmission - Transmission has the features you expect in a BitTorrent client: encryption, a web-based interface...
LibreTorrent - LibreTorrent is a Free as in Freedom torrent client for Android 4 and later, based on libtorrent.
Deluge - Deluge is a full-featured BitTorrent client for Linux, Unix and Windows.
Android Torrent Client - Android Torrent Client. Open Source. GPLv3