Skyview superimposes the stars and constellations over your iPhone screen in camera mode.

FORBES: Apps For The Cartographically Challenged

Nokia is investing in its rival Here product, which also superimposes weather conditions as well as offering rotatable 3D graphics of some locations.

BBC: Google Maps revamp promotes ads and personalises details

In another series of works, Greenfield takes photos of turn-of-the-century blackface performers and superimposes a subversive message that looks like an eye chart.

NPR: The Legacy of Blackface

Or take HSBC's ''Different Values'' advertising campaign engineered by WPP group's JWT, which superimposes different captions over the same repeated image to show that people define success differently.

FORBES

One of this year's most intriguing entries is by Sammy Baloji, who superimposes colonial black and white archive photos of Belgian-run mines in the Democratic Republic of Congo and places them over his color images of the decaying mines as seen today.

CNN: Photos capture plundering of Earth's resources

On "Dance Mania" he superimposes the mambo on the old Charleston favorite "The Varsity Drag, " and uses Chinoiserie effects on "Hong Kong Mambo, " an East-West dish that reminds me of the cuisine served in the Cuban-Chinese restaurants that proliferated in New York in the 1970s.

WSJ: A Taste of Tito Puente | By Will Friedwald