Wikipedia
MorphXT
eMule MorphXT is a peer-to-peer file sharing application for Microsoft Windows released under the GNU General Public License (GPL), as is its parent software eMule.
eMule connects to both the eDonkey network and the Kad network. The distinguishing features of eMule are the direct exchange of sources between client nodes, fast recovery of corrupted downloads, and the use of a credit system to reward frequent uploaders. Furthermore, eMule transmits data and control codes in zlib-compressed form to save bandwidth.