It's a fork of the first linux *mule client, lmule, originally ported by tiku from eMule 0.26d. Based upon the wxWidgets library.
xMule is knwon to be hostile to aMule and eMule, and started banning aMule and eMule >0.43x on their 1.8.4 version.
aMule is a fork of xMule.
