Nop90 has released a great looking Zelda Homebrew game for the 3DS, heres more details:

Following a vow to the Triforce formulated by Ganon on a sad rainy day, the kingdom of Hyrule changed into Picross grids. Using his courage and pencil together, Link set off on this new challenge

All you need to know about this game is in the official site of the game: http://www.zeldaroth.fr

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The source code of port is on github (https://github.com/nop90/ZeldaPicross).
The compiled game (3dsx format) is released on github (https://github.com/nop90/ZeldaPicross/releases).

Credits:
The original game is made by Vincent Jouillat (http://www.zeldaroth.fr)
This game uses the sf2d and sftd libraries created by @xerpi

Changelog

Ver. 1.0RC (02 January 2016)
- Minor fixes
- Added CIA Build

source