.minecraft

.minecraft(or simply minecraft in OS X) is the folder Minecraft creates to run from. This folder includes the .jar files, sounds and music, your personal options, worlds, etc.

Location: Windows
 * Windows XP: "C:\Documents and Settings\[Your Username]\Application Data\.minecraft"
 * Windows Vista/7: "C:\Users\[Your Username]\AppData\Roaming\.minecraft"

Mac OS X
 * "~/Library/Application Support/minecraft"

Linux
 * "/home/[Your Username]/.minecraft"

.minecraft Hierarchy

 * .minecraft (‘minecraft’ on OS X)
 * bin
 * natives
 * jinput-dx8.dll (Also present on 64 bit systems)
 * jinput-dx8_64.dll (Also present on 32 bit systems)
 * jinput-raw.dll (Also present on 64 bit systems)
 * jinput-raw_64.dll (Also present on 32 bit systems)
 * libjinput-linux.so (Also present on 64 bit systems) (linux only)
 * libjinput-linux64.so (Also present on 32 bit systems) (linux only)
 * liblwjgl.so (Also present on 64 bit systems)
 * liblwjgl64.so (Also present on 32 bit systems)
 * libopenal.so (Also present on 64 bit systems)
 * libopenal64.so (Also present on 32 bit systems)
 * lwjgl.dll (Also present on 64 bit systems)
 * lwgjl64.dll (Also present on 32 bit systems)
 * OpenAL32.dll (Also present on 64 bit systems)
 * OpenAL64.dll (Also present on 32 bit systems)
 * jinput.jar
 * lwjgl.jar
 * lwgjl_util.jar
 * minecraft.jar
 * launcher
 * launcher.jar
 * minecraft.key
 * options.txt
 * resources
 * music
 * calm1.ogg
 * calm2.ogg
 * calm3.ogg
 * newsound
 * ambient
 * cave
 * cave1.ogg
 * cave2.ogg
 * cave3.ogg
 * cave4.ogg
 * cave5.ogg
 * cave6.ogg
 * cave7.ogg
 * cave8.ogg
 * cave9.ogg
 * cave10.ogg
 * cave11.ogg
 * cave12.ogg
 * cave13.ogg
 * weather
 * rain1.ogg
 * rain2.ogg
 * rain3.ogg
 * rain4.ogg
 * thunder1.ogg
 * thunder2.ogg
 * thunder3.ogg
 * damage
 * fallbig1.ogg (Not used)
 * fallbig2.ogg (Not used)
 * fallsmall.ogg (Not used)
 * hurtflesh1.ogg (Not used)
 * hurtflesh2.ogg (Not used)
 * hurtflesh3.ogg (Not used)
 * fire
 * fire.ogg
 * ignite.ogg
 * liquid
 * lava.ogg (Not used)
 * lavapop.ogg (Not used)
 * splash.ogg
 * water.ogg
 * mob
 * ghast
 * affectionate scream.ogg
 * charge.ogg
 * death.ogg
 * fireball4.ogg
 * moan1.ogg
 * moan2.ogg
 * moan3.ogg
 * moan4.ogg
 * moan5.ogg
 * moan6.ogg
 * moan7.ogg
 * scream1.ogg
 * scream2.ogg
 * scream3.ogg
 * scream4.ogg
 * scream5.ogg
 * wolf
 * bark.ogg
 * bark.ogg
 * bark.ogg
 * death.ogg
 * growl.ogg
 * growl.ogg
 * growl.ogg
 * howl.ogg
 * howl.ogg
 * hurt.ogg
 * hurt.ogg
 * hurt.ogg
 * panting.ogg
 * shake.ogg
 * whine.ogg
 * zombiepig
 * zpig1.ogg
 * zpig2.ogg
 * zpig3.ogg
 * zpig4.ogg
 * zpigangry1.ogg
 * zpigangry2.ogg
 * zpigangry3.ogg
 * zpigangry4.ogg
 * zpigdeath.ogg
 * zpighurt1.ogg
 * zpighurt2.ogg
 * chicken1.ogg
 * chicken2.ogg
 * chicken3.ogg
 * chickenhurt1.ogg
 * chickenhurt2.ogg
 * chickenplop.ogg
 * cow1.ogg
 * cow2.ogg
 * cow3.ogg
 * cow4.ogg
 * cowhurt1.ogg
 * cowhurt2.ogg
 * cowhurt3.ogg
 * creeper1.ogg
 * creeper2.ogg
 * creeper3.ogg
 * creeper4.ogg
 * creeperdeath.ogg
 * pig1.ogg
 * pig2.ogg
 * pig3.ogg
 * pigdeath.ogg
 * sheep1.ogg
 * sheep2.ogg
 * sheep3.ogg
 * skeleton1.ogg
 * skeleton2.ogg
 * skeleton3.ogg
 * skeletondeath.ogg
 * skeletonhurt1.ogg
 * skeletonhurt2.ogg
 * skeletonhurt3.ogg
 * skeletonhurt4.ogg
 * slime1.ogg
 * slime2.ogg
 * slime3.ogg
 * slime4.ogg
 * slime5.ogg
 * slimeattack1.ogg
 * slimeattack2.ogg
 * spider1.ogg
 * spider2.ogg
 * spider3.ogg
 * spider4.ogg
 * spiderdeath.ogg
 * zombie1.ogg
 * zombie2.ogg
 * zombie3.ogg
 * zombiedeath.ogg
 * zombiehurt1.ogg
 * zombiehurt2.ogg
 * note
 * bass.ogg
 * bassattack.ogg
 * bd.ogg
 * harp.ogg
 * hat.ogg
 * pling.ogg
 * snare.ogg
 * portal
 * portal.ogg
 * travel.ogg
 * trigger.ogg
 * random
 * bow.ogg
 * breath.ogg
 * click.ogg
 * door_open.ogg
 * door_close.ogg
 * drr.ogg
 * explode.ogg
 * fizz.ogg
 * fuse.ogg
 * glass1.ogg
 * glass2.ogg
 * glass3.ogg
 * hurt.ogg
 * pop.ogg
 * splash.ogg
 * wood click.ogg
 * step
 * cloth1.ogg
 * cloth2.ogg
 * cloth3.ogg
 * cloth4.ogg
 * grass1.ogg
 * grass2.ogg
 * grass3.ogg
 * grass4.ogg
 * gravel1.ogg
 * gravel2.ogg
 * gravel3.ogg
 * gravel4.ogg
 * sand1.ogg
 * sand2.ogg
 * sand3.ogg
 * sand4.ogg
 * snow1.ogg
 * snow2.ogg
 * snow3.ogg
 * snow4.ogg
 * stone1.ogg
 * stone2.ogg
 * stone3.ogg
 * stone4.ogg
 * wood1.ogg
 * wood2.ogg
 * wood3.ogg
 * wood4.ogg
 * tile
 * piston
 * in.ogg
 * out.ogg
 * sound
 * loops
 * .svn
 * birds screaming loop.ogg (Not used)
 * cave chimes.ogg (Not used)
 * ocean.ogg (Not used)
 * waterfall.ogg (Not used)
 * random
 * wood click.ogg (Not used)
 * step
 * grass1.ogg
 * grass2.ogg
 * grass3.ogg
 * grass4.ogg
 * gravel1.ogg
 * gravel2.ogg
 * gravel3.ogg
 * gravel4.ogg
 * stone1.ogg
 * stone2.ogg
 * stone3.ogg
 * stone4.ogg
 * wood1.ogg
 * wood2.ogg
 * wood3.ogg
 * wood4.ogg
 * newmusic
 * hal1.ogg
 * hal2.ogg
 * hal3.ogg
 * hal4.ogg
 * nuance1.ogg
 * nuance2.ogg
 * piano1.ogg
 * piano2.ogg
 * piano3.ogg
 * pe
 * humble.png (Not used)
 * streaming
 * 11.mus
 * 13.org
 * 13.mus
 * blocks.mus
 * cat.org
 * cat.mus
 * chirp.mus
 * far.mus
 * mall.mus
 * melohi.mus
 * stal.mus
 * strad.mus
 * ward.mus
 * where are we now.mus
 * saves
 * screenshots
 * stats
 * stats_unsent.dat
 * stats_unsent.old
 * stats_[PLAYER NAME].dat
 * stats_[PLAYER NAME].old
 * texturepacks