Dark Sky - Hyperlocal weather information, now on the web ⛈

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.

Tinyclouds - An adorable new weather app for iPhone and iPad

SunIZup - SunIZup helps you to know the timings of the various Sunlight phases including the Golden Hour and...

CARROT Weather - An eerily accurate weather app with hilarious forecasts

Sun Seeker App - Projects solar path, solar energy, sunlight exposure and other solar related information onto user-supplied Photo Sphere (spherical photo) images, with a zoom/pan 3D viewer, as well as onto other overhead images such as site plans.