Today Apple announced that they will be offering all of these for free for new iOS device users.
This means that you will be saving $9.99 an app if you are purchasing a new iPhone, iPod or iPad running iOS 7.0 or higher, which will sum up to a nice savings.
Unfortunately Apple has not extended this courtesy to current iPhone, iPad or iPod Touch users. If you are thinking of buying a new iPhone 5S or a new iPhone 5C when they hit the market, you are in luck.
source - Apple