MeridianWay
Find the right route based on the sun.
The app calculates two routes between a starting point and a destination. The first one looks for as much sun as possible. The second one stays in the shade as long as possible.
For each calculation, the position of the sun at the chosen time is taken into account, along with the buildings along the way.
In winter, enjoy the warmth of the sun. In summer, find the cool of the shade.
Open source
Meridian Way's code is freely available. Anyone can read it, modify it, or contribute to the project.