
Developers are continuing to offer apps at limited-time discounts or giving them away for free to boost their numbers. Arnold Kim, founder of MacRumors, created a great new way of looking for iPhone apps online called AppShopper.com, which was used to compile this list. Today's list includes TKO Marbles, TKO Numbers, TransMate, XpenseTracker, World Countries, American Dominoes and BrainHack.