Sun Surveyor - Sun Surveyor calculates Sun and Moon Positions, Sunrise & Sunset and Moonrise & Moonset...
SkinVision - App to detect skin cancer - with 70%+ accuracy
The Photographer's Ephemeris - TPE is a tool to help you plan outdoor photography in natural light, especially landscape and urban scenes. It is a map-centric sun, moon and milky way calculator: see how the light will fall on the land, day or night, for any location on earth.
Scanoma - Use your phone for checking your skin issues
SunIZup - SunIZup helps you to know the timings of the various Sunlight phases including the Golden Hour and...
Sunscreen Finder - Find the sunscreen that you will actually use