The german government offers some nice APIs that are free to use.
You can imagine some app e.g. a EV Charging map using the Ladesäulenregister-API.
For an overview of available APIs have a look at: https://api.bund.dev/
Update (02.2023)
The website https://bund.dev is not actually provided by the german government but rather a community project that sums up the available APIs.