Every story and comment from the Hacker News API, in a layout borrowed from 2001.
A comment on Open Food Facts, the wikipedia of food, reaches 100K products in 177 countries.
https://itunes.apple.com/en/app/open-food-facts/id588797948 https://play.google.com/store/apps/details?id=org.openfoodfa... http://www.windowsphone.com/en-us/store/app/openfoodfacts/5d...
http://world.openfoodfacts.org
More general: labeled foods (at least with a barcode or name and other interesting data) and a camera.
https://itunes.apple.com/en/app/open-food-facts/id588797948 https://play.google.com/store/apps/details?id=org.openfoodfa... http://www.windowsphone.com/en-us/store/app/openfoodfacts/5d...
http://world.openfoodfacts.org