redsn0w is Completely Free!
Redsn0w is a multi-platform jailbreak and unlock tool created by the iPhone Dev Team. redsn0w is very easy to use, and it supports all of the current iPhone and iPod Touch devices running on firmware.
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Accurate method to jailbreak your iphone 4, iphone 3GS or ipod 4G.
Now it’s easy to add your SAM tickets in your primary ramdisk jailbreak.
Redsn0w will do the magic and jailbreak your iPad.
You can use Redsn0w to jailbreak iPhones, iPods, iPads, Apple TV and Redsn0w compatible with many iOS firmware versions. A cross-platform Customizations include boot logos, recovery logos, and "verbose" boot.
Uses DFU mode to try to automatically determine which device and FW you have
Number of options available under the “Extras” tab.
RedSnow will take both the individual SAM activation ticket plist file, and the complete zip file produced by redsn0w’s “Backup” option.
Best of all redsn0w is free!