The original BitTorrent client, and the standard by which all other clients are judged. We tested the Windows version (Mac OS X and Linux versions are available as well), whose clean interface has three basic elements: a large progress bar for each torrent you're working on, a slider that controls your maximum upload rate, and a link to the BitTorrent Search engine. Like BitPump, BitTorrent lacks the ability to throttle speeds on individual files, but it offers some simple options for controlling how long you seed your downloads—indefinitely, or by share ratio or specific number of minutes. Right-clicking on each torrent gives you additional information. This client is clean and simple.