3uTools is an all-in-one software tool designed to manage iOS-based devices. It provides users with a suite of features including flashing firmware, jailbreaking, downgrading, and data backup/restore. It also offers a wide array of tools for managing and organizing music, photos, videos, applications, and files. It provides users with the ability to download applications, manage system settings, and manage music and photo libraries. 3uTools also includes an app store where users can download and install applications to their device. The app also includes a repair tool which can help users fix common iOS issues. Additionally, 3uTools includes a file manager which can be used to manage files, view backup data, and transfer files between different devices.
redsn0w
Pangu
PwnageTool
Discontinued Last update appears to be 4 years old: http://blog.iphone-dev.org/tagged/PwnageTool