Credits

• Game design, programming, graphics: Markus Persson ("Notch") from the beginning, later Jens Bergensten ("Jeb") and the rest of Mojang
• Music and sounds: Daniel Rosenfeld ("C418")
• Ingame artwork (paintings): Kristoffer Zetterstrand
• Additional programming: Paul Spooner
• Owners from this Old Minecraft website revival: ItsJustAPlayer

Minecraft uses sounds from the Freesound project.
For a list of samples currently or previously in use, see this list, and this one.

Technologies Used in Minecraft lol

• Java by Sun Microsystems
• LWJGL (license) by a whole bunch of talented people.
• "3d Sound System" by Paul Lamb.
• JOrbis (license) by JCraft.