Ladik's MPQ Editor
http://www.zezula.net/en/mpq/download.html (http://www.zezula.net/en/mpq/download.html)
The program above allows you to extract/patch or possibly even add extra data to MPQ files from Diablo III and other battle.net games.
MPQ (MoPaQ)
is an archive format developed by Blizzard Entertainment, purposed for storing data files, images, sounds, music and videos for their games.
I like this.. I have one i made myself back in the Diablo 1 days.. With these MPQ prog's you can find SO MUCH secret stuff they didn't include into the game.. Items, Quests, NPC's.. After I went through the D1 disc I was like WTF IS ALL THIS STUFF AT IN THE GAME! LOL! Still.. This will be fun to play around with on Diablo 3.
Stickied