Super Mario Maker for Wii U is published and developed by Nintendo. The game contains a simple, yet versatile level editor which lets users create and upload their own Mario courses.
The tool is really fun to play around with and I make new courses every now and then. I go by the username Clink and you can find my courses via the official bookmark page for Super Mario Maker. Just follow the link bellow.
Mario Maker Profile: https://supermariomakerbookmark.nintendo.net/profile/MasterClink
A while back I also wrote an in-depth analysis of my course Let’s-a-go!