Open Food Facts, the wikipedia of food, reaches 100K products in 177 countries
en.blog.openfoodfacts.org
en.blog.openfoodfacts.org
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...
More general: labeled foods (at least with a barcode or name and other interesting data) and a camera.
A data page: http://world.openfoodfacts.org/data An API doc at : http://en.wiki.openfoodfacts.org/API