Looking for a 3D window into Italy's great cities? '3D Photos' is a free anaglyph photo app from Black Frog Industries (known to Manifesto readers as the DeLorean photographer from this post).
Kudos to Black Frog for making the app Universal, meaning it runs natively on the iPhone, iPad and iPhone 4 with retina display. Window placement and color balance appear to be optimized for minimal ghosting, and the images are crisp and clear.
Images from Florence are available for free, with additional locations are available as in-app purchases.
Download it from the iTunes App Store.