Solaris Sky Calendar - An astronomy calendar right in your pocket
Be Focused by XWaveSoft - Simple Pomodoro timer in your Mac's menu bar
Lumy - Helps you track photographic times
Effortless - Stay focused and beat procrastination on your Mac.
Sundial App - Sun & Moon times and alerts for iPhone, iPad, & Apple Watch
Memory by Timely - An intelligent timeline of everything you did in a day.