"Panols allows photographers to share the panoramic photos taken with their iPhone, as well as other photos stored in their Photo Library, with Instagram users everywhere. The app takes the Panorama shots stored in the device's Photo Library, and accurately splits the wide-shot into three separate shots, allowing users to take advantage of the Instagram profile display grid to showcase them in their full glory via the social network's standard three-across display view."
Note that you'll need to redeem through the Apple Store app in order to get it for free.
I read free Panadol :(