For Windows written as an aid for game inventors.
nanDECK is a System Utilities software developed by Nand. After our trial and test, the software is proved to be official, secure and free. Here is the official description for nanDECK:
Brothersoft Editor: NanDECK is a software for Windows (any version) written as an aid for game inventors, with the aim of speeding up the process of designing and printing deck of cards (useful during prototyping and playtesting).