Google Calendar - Spend less time managing your day & more time enjoying it
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.
Business Calendar - Powerful and easy to use calendar app for Android including weather, widgets and tasks.
SunIZup - SunIZup helps you to know the timings of the various Sunlight phases including the Golden Hour and...
Jorte - Schedule books must be practical and has a good design.
SunCalc - Find out where the sun will be at any time in any location