SunCalc - Find out where the sun will be at any time in any location
Suntimes - Android app (and widget collection) that displays sunlight and moonlight times for a given location.
Sun Surveyor - Sun Surveyor calculates Sun and Moon Positions, Sunrise & Sunset and Moonrise & Moonset...
SunIZup - SunIZup helps you to know the timings of the various Sunlight phases including the Golden Hour and...
Solar Clock: Circadian Rhythm - Solar Clock: Circadian Rhythm syncs the Solar time with your Local time and shows important events (Sunrise, Waking up, Breakfast, Lunch, Solar Noon, Sport, Sunset, Sleep Time, …) based on Circadian rhythm.
Google Calendar - Spend less time managing your day & more time enjoying it