Platform: iOSAndroid; Free

Mobile stock photography apps are huge right now with the most popular being Foap. Turn your digital polaroid shots into greenbacks by uploading them onto the service, which the app approves and uses for marketing and sales purposes. It also offers a Missions section where companies post the types of images they're seeking, plus all mandatory tags. Listed shots can get you $10 a pop with Foap getting half the cut. Professional shutterbugs need apply.