There are almost 13,000 photo apps on iTunes and Google Play. Almost the entire top ten originate from Israel. The reason is probably due to the fact those apps are the hottest trend in the smartphone market right now. And Israelis are the biggest users of smartphone apps in the world.
http://www.ynetnews.com/articles/0,7340,L-4474325,00.html
http://www.youtube.com/watch?v=2XLkzMWywXQ