Google play: one account multiple devices
39935
Can bought Android apps be shared between devices you own?
1263
How can one link / merge / combine / associate two accounts / users? (Anonymous / unregistered / cookie, or Google / Facebook / registered)
103635
How to copy YouTube playlist from one account to another
123454
Can two PS4s log in to the same PSN account?
99857
Duplicate accounts in accounts tab
64196
Change user associated with Google Drive account (OSX) when old account does not exist
81602
How to transfer installed apps from one account to another
33515
Can one PlayStation Plus subscription be shared between multiple PSN accounts on the same machine?
4217
How do I transfer my Pokemon Go account to another device (Android to Android)?
59375
How-to unlink the main Google account from android device without a factory reset
88939
Change Gmail account to make in-app purchase?
96628
Transfer Clash of Clans account from one G+ to another G+ account?
59870
How to use multiple Steam accounts without re-entering passwords?
50597
How do I transfer a Gmail account to a different Google account?
92030
Will there be conflict if there is two account with the same domain?
120386
How to remove the association between two Gmail accounts?
64559
How to change the account for Android Market?