Tipped by commenter Mountanderson and verified by our own 3DS units, Zelda's 25th anniversary celebration is now in full swing four times over, as The Legend of Zelda: Four Swords Anniversary Edition is now available free in Nintendo's eShop and DSiWare.
A freshened-up version of the classic multiplayer Zelda game with cross-platform compatibility between 3DS and DS, the Four Swords Anniversary Edition delivers an amazing value for the money, especially considering there's no money involved. Go ahead, complain about free things. There are people starved for Zelda games in other countries, you know.
In the 3DS' eShop, Four Swords is joined by a $US5.99 copy of the The Legend of Zelda: Link's Awakening DX for the Game Boy colour, as well as a bunch of interesting and informative 3D videos, because you need that sort of thing.
Enough typing, go play.