This is the Puzzle NSMBW Tileset Editor, updated to work with New Super Mario Bros. U tilesets.
The Puzzle NSMBW Tileset Editor was created by Tempus.
The Python 3 and PyQt5 porting was done by RoadrunnerWMC.
The additional changes to support the New Super Mario Bros. U tileset format were also done by RoadrunnerWMC.
Heavily modified by AboodXD.
The program is GNU GPL v2 licensed (see license.txt).
The original program can be found at https://github.com/Tempus/Puzzle .