I love my martial arts almost as much as I love technology.
I am a black belt in TaeKwonDo so I was especially interested in this Unofficial Black Belt Magarchive app.
It includes all of the magazine archives since the 1960s so it almost goes back to before me but not quite. For just 99 cents it's definitely worth the money.
This developer also has other martial arts apps - HansTricks; iBeNinja; iTrick - All worth getting if you love the sport.