Nokia HERE maps was available only on the Windows Lumia phones. This application let you download the maps of a specific region and can be used even with out a data connection. Now Samsung is bringing this application to Samsung galaxy devices. You can get this application from this link (if you are a Galaxy phone user and have Samsung apps in your phone).
If you are using other android phones, you can download the APK file from here and install it on your device. Remember this application is in Beta Stage. You will have to allow installation from unknown sources under security settings. read the compatibility note from HERE
The app is designed to run on Samsung Galaxy smartphones running Android 4.1 (‘Jelly Bean’) and higher, with 1GB of RAM or more, and access to the Samsung Galaxy Apps Store. Though Samsung itself, of course, will have the final say which devices are, or aren’t, offered access
Here are some screenshots
Downloading offline Maps
Nokia will be releasing the HERE for iOS and all Android devices officially.
To use the HERE app you need not to register an account, but if you have an account there are additional benefits like creating collections, Access from any device etc.