What are the best app´s for a student [ipad2]

I just purchase an ipad2
I will use it to help me on university, so what are the best apps to use in this situation
They can be free apps or not just want to know whats better

A lot depends on how you intend to use your iPad. If you use it for doing word processing for example, you can purchase Pages from the Mac App store for $9.99. There are a multitude of free and paid applications available. Just open iTunes and access the iOS app store and do some searching or browsing about.

Everything from business and educational apps to games are available. Depending on how much memory your iPad has, you should be able to load it up with lots of apps.

Add to what chscag has said look as a student download and have a good look at Apple - iTunes U - Learn anything, anywhere, anytime. which is solely aimed at students.
https://itunes.apple.com/au/app/itunes-u/id490217893?mt=8

My vote would be Angry Birds.

Just in case you lose your iPad while at Uni... Find My iPhone.
Best of all it's a Free app for both iPads and iPhones!

For note-taking, you might want to look at Notability ... lets you type, or scribble, or audio record (or a combination thereof) your notes.

I mostly used iTunes U app, Evernote and iStudiez Pro ipad educational application for study.