Here is Gamecard Dumper it can :
-Dump 3DS Card (full)
-Dump 3DS Card (trim)
-Dump & Decrypt 3DS Card (full)
-Dump & Decrypt 3DS Card (trim)
-Dump 3DS Card to CIA
-Dump DS/DSi Card (full)
-Dump DS/DSi Card (trim)
-Dump 3DS Card Private Header
Created from decrypt9's source code and it's only for a9lh
It isn't something special but is my first homebrew
SORRY FOR MY BAD ENGLISH