In a usual route planner software like google maps you can specify a point A, let it calculate the shortest path to a point B and get an estimated traveling time. However is there a software which does the following:
Specify a point A and draw an area around A which contains all points B where the traveling time (shortest time for a car on streets) from A to B (1:1 routes – i.e. always the same A with only one B, not the Traveling Salesman problem) is less than a given time T (e.g. T = 15 min).
I am interested in maps for germany if that matters.
If possible this software should also be able to avoid highways in for the calculation. I am also interested in this for bicycle or public transport (such as google maps already offers it for just two points A and B).
The software should be gratis and run on linux, on the web or on windows.