Must have Android apps

So I just got my first Android phone. I've had a tablet for a while, rarely use it though because apps generally aren't tablet-ready on the android system yet.

Anyway, what are some must have apps? I've got unlimited data, so don't let anything big scare you from a recommendation!

When I bought phone Android, I immediately pumped Angri Berds. And couldn't played enough)
Then i began to install the application for music, videos and photos