Changes one command & re-adds another.
/toggledownfall - You can use this command to clear the weather
/gamemode 0-3 - With 0 being survival, 1 being creative, 2 being adventure and 3 being spectator. This restoration to the gamemode command brings both speed and nostalgia.
This mod is great for people who are used to the old times! Feel free to give suggestions of other old commands that you feel need re-implementing. :)