PwnageTool is a Mac app that allows you to jailbreak iOS devices. This "jailbreak" allows your iOS device to run unsigned content on your iPhone. Most people jailbreak their iOS devices to get access to the software that isn't available on the App store. There are other users who jailbreak to pirate applications. PwnageTool doesn't do any pirating of its own, though. It is simply an application that was designed to upgrade your iOS device with a hacked firmware that installs Cydia and Icy on it. These are new software repositories that all jailbroken devices will show when they are first booted. From there, you can download new software. Of course, you can still use the App store.
Using PwnageTool can sound scary at first. But PwnageTool is one of the tools that made jailbreaking an easy task. It is as simple as it gets. You simply connect your iOS device and follow the on-screen instructions or the guides on the DevTeam website.
I heard of people who have used this app to jailbreak their iPhones and iPod Touches and didn't have any problems. You should do this at your own risk, like it is stated on their website. There is also a list of supported devices on the website.
