Shareaza
Shareaza is a free Windows–based peer-to-peer client which supports the Gnutella, Gnutella2, EDonkey Network, BitTorrent, FTP and HTTP network protocols and which can handle magnet links, ed2k links, Piolet links, and the now deprecated Gnutella links. Shareaza has unique features, including ghost ratings, a completely user-configurable queue area, and multinetwork support. The program started as a Gnutella client but recently branched out and developed Gnutella2, a completely open and documented network. Shareaza's interface is easy to use, yet powerful and fully skinnable. Shareaza's download core was built to provide optimum performance from any number of sources. Shareaza can manage your download queue automatically, or you can take charge and modify the status of files or even individual physical transfers and sources.