ebay-kleinanzeigen.de . German Ebay, where you can buy and sell almost everything. From selling your old German language books to the apartment search.
http://www.shpock.com/ With Shpock – the boot sale app for beautiful things – you’ll find the most beautiful things in your neighborhood and sell your things quickly to other people around you.
https://www.dict.cc/ Dictionary for 51 language pairs, available without an internet connection (offline dictionary). The vocabularies can be downloaded and updated for free within the app.
http://maps.me/en/home Get instant access to detailed maps of all countries from anywhere in the world! No internet connection is required.
México: México City
Australia: Sydney, Brisbane, Perth
UK: London (TFL, ZipCar, DriveNow, Santander Cycles).
Germany: Berlin, Hamburg, Munich, Cologne, Düsseldorf, Hannover, Stuttgart, Dortmund, Bochum, Essen, Bonn, Duisburg, Oberhausen, Wuppertal (all public transport, DriveNow, Car2Go, Call a Bike, nextbike).
Switzerland: Zurich (ZVV).