Windows/Mac: Phone Disk mounts an iPhone, iPod touch, or iPad natively in Windows or Mac OS X, just like a removable USB drive. The developers have extended a free download period until December 1, so snag it sooner rather than later.
While Windows and Mac computers can usually "see" an iPhone or iPod touch for the purpose of syncing through iTunes, with Phone Disk installed, your computer actually finds the iOS device in "disk mode". You see the majority of your phone's actual file contents and can use any spare storage space on it as a straight-up portable drive — assuming you can get at those files again when you need them. We previously tried out Phone Disk and dug how it worked with any model of iOS touch device, no jailbreak needed.
Phone Disk is a free download for Windows and Mac systems until December 1.