A cross-platform open source BitTorrent client (debug info)
transmission_debuginfo-3.00-4-x86_64
Transmission has the features you want from a BitTorrent client: encryption, a web interface, peer exchange, magnet links, DHT, µTP, UPnP and NAT-PMP port forwarding, webseed support, watch directories, tracker editing, global and per-torrent speed limits, and more.