Ripdev's InstallerApp makes installing third-party jailbreak applications on your iPhone slightly easier, by eliminating the need to jailbreak your iPhone at all. You just need to pay $7 for the privilege.
The process works by installing an app onto your iPhone that's not quite jailbreaking, but is enough to allow those not-quite-official applications to get on there. If you gave us the choice of paying $7 or running jailbreak on our phones—which is fairly easy as long as you have some tech knowledge—we'd choose real jailbreak. [Ripdev via 9 to 5 Mac]