Credits
Minecraft is developed by:Game design, programming, graphics: Markus Persson ("Notch")
Music and sounds: Daniel Rosenfeld ("C418")
Minecraft uses sounds from the Freesound project.
For a list of samples currently or previously in use, see this list, and this one.
Minecraft uses the following technologies:
Java by Sun Microsystems
LWJGL (license) by a whole bunch of talented people.
PyroNet by Riven
"3d Sound System" by Paul Lamb
JOrbis (license) by JCraft.