Evasi0n is a jailbreaking tool developed by the evad3rs team, which allows users to gain access to the root of the iOS operating system on their device, allowing them to install unauthorized software and customize their device in ways that are not allowed by Apple. It was the first jailbreak tool to support all versions of iOS from iOS 6.0 through to iOS 6.1.2. Evasi0n can be used on all devices running iOS 6.0 through 6.1.2, including the iPhone 5, iPad 4, iPad mini, iPod touch 5th generation, and more. It is a full untethered jailbreak, meaning that it does not require the device to be plugged into a computer to work, and provides full access to the root of the iOS operating system. Evasi0n also offers a vast range of customization options for users, such as the ability to install unauthorized applications and tweaks, customize the look and feel of the device, and access system settings that are otherwise hidden.
Discontinued Last update appears to be 4 years old: http://blog.iphone-dev.org/tagged/PwnageTool