Well, well, well, I had that misconception too!
While I was puzzled why madshi provides the open source DebugEngine while he already has the madExcept commercial package, but I didn't think too much since Jeroen said so...
Maybe people confused by the name 'Mahdi' with 'madshi' the nickname :)
I shouldn't have that misconception - because IIRC I asked Mahdi Safsafi and he's a doctor from the Middle-east, while IIRC madshi is in Germany...