Super Mario Bros X

Super Mario Bros X is a fan-made Mario game that allows you to make your own Mario games. These games are considered "Episodes". Neoflash creates episodes for Super Mario Bros X. Some examples of these are SMBX Darkson, Dark Star Adventure, SMBX Tutorial, and Return to Retroville. Although Neoflash creates these episodes, they did not make Super Mario Bros X.

Redigit
Redigit (Andrew Spinks) is the programmer of Super Mario Bros X. He is also the creator of Terraria (A popular steam game). He quit updating Super Mario Bros X back in 2013. Since then, a user named Vatteri has created an update for Super Mario Bros X, along with a much better website for it.