So far we've only seen third-party download game in the Nintendo 3DS eShop, the decent but could-do-better Let's Golf! 3D. That offering is set to multiply significantly by year's end though, as Nintendo announces the 3DS download games on the way before 2012.
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Metroid: Other M! FreezeME! Loads of Fire Emblem discounts! Much more!
Nintendo Selects! Lost Reavers beta! Runbow DLC! Olympia Rising! Much more!
Futuridium EP Deluxe! Cat Heroes! Mario Basketball! Tasty Discounts! More!
Super Meat Boy! Mario Strikers! Contra III! Discounts galore! More!
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Star Fox Zero/Guard! Mario Party! Langrisser Re:Incarnation Tensei! More!
Mario & Sonic in Rio! Lovely Planet! Wario Shaking It! Much More!
Pocket Card Jockey! LEGO Avenger Black Panther DLC! Discounts galore! More!
Fire Emblem Fates! PixelJunk Monsters! Mario in Minecraft! Much more!