- https://oeffi.schildbach.de
- https://oeffi.schildbach.de/download.html
- https://oeffi.schildbach.de/donate.html
- https://oeffi.schildbach.de/fdroid/repo -> F-Droid-App
- https://plus.google.com/113332630894285830827
- https://play.google.com/store/apps/details?id=de.schildbach.oeffi
- https://gitlab.com/oeffi/oeffi
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