Foap

Foap is a micro stock photography app made exclusively for iPhone photography. You upload your photos for review using their app, and then when/if they’re approved they become available for purchase in their market for editorial or commercial use by third party companies. There’s no end to the number of times a single photo can be sold (at the fixed $10 rate), so there’s a lot of potential to earn money  ($5 per sold photo) if your work is popular enough.