SkinVision - App to detect skin cancer - with 70%+ accuracy
Sun Surveyor - Sun Surveyor calculates Sun and Moon Positions, Sunrise & Sunset and Moonrise & Moonset...
Vacation® by Poolside FM - The world's best smelling sunscreen
Suntimes - Android app (and widget collection) that displays sunlight and moonlight times for a given location.
Scanoma - Use your phone for checking your skin issues
Sol: Sun Clock - Get reminded when it's sunrise or sunset, wherever you travel!