Super Mario Star Road, a.k.a. the third dimension, is a hack of Super Mario 64 created and inhabited by Skelux. Mario visited it a few times before Into the Fourth Dimension and during the movie. It seems to be highly based on Super Mario World and Super Mario RPG: The Legend of the Seven Stars, both for the Super Nintendo Entertainment System(SNES). It is based on Sm64.
The Fourth Dimension is a texture pack for Star Road.
There are some new versions: A DS port which is an edit of Super Mario 64 DS, a Deluxe version, a extended version, a beta version and a sequel.