There are free apps, and as long as you get the apps that are supposed to be free for free, then it is legal. If you get the apps you are supposed to pay for free by jailbreaking the iPod Touch, it is illegal.
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Free apps are 100% free.
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No. 'Free' apps means that they're free. You don't have to pay
anything for free apps.
Sometimes few websites do market some of there apps as free
applications, but actually they are charging for them through
iTunes.Apple.com
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well there's over 450 apps that are free but half of them are
lite apps!