Zappar

Zappar Limited is an augmented reality (AR) company established in 2011 from London, U.K. They specialize in making AR app experiences for advertisers and special events.

Products
Since late 2013, they have been making Angry Birds-related experiences in their app.

Sources:

 * "Super Interactive Annuals" - Zappar
 * "Angry Birds Action!" - Zappar
 * "Little Birdy" - XR marketing