-Onedrive comes pre-installed
-Cleanup comes pre-installed
-Contacts transfer comes pre-installed
-More free RAM when you restart your device
digging in for more.. post it here if you found something changed.
If you don't know what Cleanup does - It's a kind of Task killer allowing you to close your non-usable apps. What you are waiting for now ?? Go to Settings>About Phone>Software Updates>Check for Updates and update your device