An emuNAND Tool for GNU/Linux and OS X.
It can backup, restore and decrypt the emuNAND on an SD card.
Change log (1.2):
Backup/restore the Nintendo 3DS folder on the FAT32 partition
Built on Qt 5.4.1, with native file selection dialogs for GNU/Linux
Improved file dialogs
Improved SD card autodetection
Skip caching to SD card during restore on GNU/Linux