Below are a couple of them to get you started, but if you know of any others, or if you are planning on writing one yourself, let us know! While these are not the only ways to build a deck, they are a good place to start if you want to know who fired first; the Kirin Tor Mage or the Ethereal Arcanist.
Aggro Mage in the Modern Meta by Nydra
Aggro Mage by Saturos47
Hearthstone Deck Guide – Starter Mage (Basic Cards Only) by Bog Otter
Mage Deck Guide by Messiah
Mage Decks at HearthPwn
Have a guide of your own to share with the community? Send it to Keganbe@blizzard.com.