The Homebrew Channel

This channel is a freeware program that can be used to play homemade games and programs, as well as other features such as bypassing the regional lockout and using DVDs in the Wii (for program running, movies will not work due to the fact that the drive rotates the opposite direction.)

The channel is loaded by downloading a modified save file from The Legend of Zelda: Twilight Princess and playing the file. My moving one step in the game, it will download the channel to the Wii's memory.

Official Site