CID Getter https://play.google.com/store/apps/details?id=org.tritonsoft.cidgetter

CID getter simply shows you the CID of your phone, which indicates what country/region/carrier/network your phone is intended for. List of CID’s here

MoreLocale2 https://play.google.com/store/apps/details?id=jp.co.c_lis.ccl.morelocale

Say you got a German phone and want to use it in Sweden with Swedish on, this is where MoreLocale2 comes into the picture. BUT! with 4.2 and above you need to do some things for it to work

Helium app sync & backup https://play.google.com/store/apps/details?id=com.koushikdutta.backup

Simply an app to backup your game data and such, and you do not need root for it. Works pretty well, can be a little tricky to get started but not that hard