Hello Martidr, welcome to the forums! Good choice, I'm sure you'll enjoy this phone.
In some places Motorola is taking a long time to deliver a new phone.
As Thespinner said the apps will depend on your interests. Tell us what kind of app you need and we'll help you with the different options. Here are just a small selection of mine.
Pocket - offline reading.
Feedly - feeds reader.
Evernote - writing notes and more.
Nova Launcher - custom launcher.
Zooper Widgets - create Widgets.
Power Toggles - system switches.
Gsam Battery Monitor - battery stats.
AC Forums app. Of course