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Undestructible by The_Icy_One

Make your structures undestructible.

Unfathomed Depths Mod by Josh029

Ancient Technology of Mysterious Depth.

Ungrab Mouse Mod by Jaideep Singh Heer

This is a simple mod to allow players to ungrab the mouse to do other things on their PCs while the game runs.

Ungui by Mrkol

Declaring a war on GUI screens! This was made as part of MODJAM3. If you are reading this in 2014, then I probably got into top 10. Otherwise I would totally be all sad and stop modding for a couple more months :(

UniDict by WanionCane

a mod about unifying all the things.

UniQ by domi1819

OreDict unifier

Unicode Font Extension by BRE

This mod allow you to read very small unicode fonts.

UnicodeFontFixer by oldjunyi

UnicornMod by SquidBananas

This is a Mod that adds Unicorns and a new Biom!!!

Unidye by LinusPhoenix

Makes Wool Dying and Dye obtaining much more convenient. Needs IC2.

Unified Items

Adds items and blocks like copper and tin so that we can have a more 'unified' playing experience

Unified Items by chazwarp923

Adds items and blocks like copper and tin so that we can have a more 'unified' playing experience

Unified Mode for In-game Account Switcher by The_Fireplace

The Unified Mode addon for In-Game Account Switcher

Unifier by grundyboy34

Item Unifier based on AutoUnify

Unify by Geoffrey McRae

Unifies Mod Item Types

UnimCraft

UnimCraft adds new Items and Blocks!

Unique Crops by bafomdad

Unique crops, unique growth, unique drops

Unique Ores

A mod that adds unique ores, items, and machines

UniqueFoodStalksMod

Adds New Food Items

Unity by RandomByte

Universal Currency by mariofish

Adds a physical form of currency into Minecraft!

Universal Electricity by Calclavia, DarkCow, tgame14, Maxwolf, Alex_Hawks

opensource tech

Universal Input Fix by Meow J, Brian 1461748123

Input fix for GNU/Linux Mac Windows.(Test)

Universal Remote by Clayborn

Ever want a wireless... crafting grid? chest? any block in the game? Now you can! Use Universal Remote to access all the things from anywhere.

Universal Singularities by Wealthyturtle, WanionCane

A Mod that Adds an Unending Amount of Singularities!

Universal Tools Mod by Rubik's

Mod add Universal tools.

Universal Weapons by Darty11

A weapons mod that adds weapons for modded materials!

Universal: Interdimensional Escape Singularities by Wealthyturtle

Customized Singularities for the Modpack, Universal: Interdimensional Escape. Do Not Use Without Permission.

UniversalCommand

Little utility mod

UniversalCore by UniversalRed, big_Xplosion, SeamusFD, AEnterprise

UniversalOreMOD

このMODはMCreatorを使って作成されました

Universe Mod

Universe Mod adds 3 more universes(dimensions): -Land of the Spiders, Dark-realm, and the Unknown; -12 new ores: Land of the Spiders: ~ Sekiton, Aian, Gorudo, Daiyamondo, Emerarudo Dark-Realm: ~ Meitan, Tieding, Jin, Zuanshi, Cui The Unknown: ~ Symbols 1, Symbols 2 -2 new bosses(Names are a WIP): Tarantula (Land of the Spiders), Unknown (Unknown) -10 + new hostile mobs: Land of the Spiders: ~ Emerald-Cave Spider, Anchor Spider, Black Widow, Wolf Spider (Based on the actual wolf spider not a MC wolf) Dark-Realm: ~ (Grim) Reaper, Dark-Realm Villagers, Grinder, Ghoul The Unknown: ~ ?, ?!, !?, Cubes -New Villagers (just well without villages for now) found free roaming the Unknown

Unknown Ores

Useful Unknown Ores!

Unkown

...

Unlimited Colors by Veillardt

16 M Colors for your blocks !

UnlimitedFuel

WOW UNLIMETED FUEL!

Unlit Torches by pelep

Unlit torches! This mod adds unlit torches to the game and also modifies other vanilla behavior.

Unloader by Unnoen

Unload dimensions not in use.

UnlockCraft by Diadas

Locks all recipes to unlock during gameplay

UnlovedVanilla by Impelon

A Mod adding many, different features that got left behind in the development of Minecraft

Unnamed Dimension by Mr. Metric

Example placeholder mod.

UnnamedMod

Just some random stuff.

UnobtainableBlocks

This is an example mod

UnobtainableBlocksMod

This is a mod that lets you get unobtainable blocks by crafting them

Unofficial Parasol

You can fall slowly with Parasol!

UnrealMMO by yuxuanchiadm

The mmo mod for user.

Unsheathe

利刃出鞘 by 2403

Unstable Matter by Yvesmiguel

Adds matter related items in the most unrealistic way possible.

UntitledMod by immibis

Modjam 4 entry from immibis

Unturned MOD by spuash918

このMODはUnturnedの要素を追加するMODです。 また、二次配布は禁止です

Unwritten Blocks by UnwrittenFun

A collection of blocks made by unwrittenfun

Up And Down And All Around by Mysteryem

Mod that lets you change the direction of your gravity

Up-Sizer by The_Wabbit

Lets you increase the max stack sizes of Minecraft items.

UpToDate by Strikingwolf, trajing, PhoenixTeam

Checks for updates

Update Checker by Tminor1

Will check for an update for Fun Craft Mod Pack 2.

Updated Blocks by Russia9

This mod adds blocks from new versions, for example concrete, andesite or granite.

Updatifier

Easy to use update checking for Sponge plugins.

UpgradableSwords

A mod that allows Vanilla Minecraft Swords to be upgraded into stronger swords.

UpgradeSwords

Adiciona Novas Swords

Upgraded Pickaxe by Hawaii_Beach, NicosaurusRex99

Upgraded Tools Mod by vincentmet, AgentCPU0, skunkdonkey

New Sticks And Tools.

Uphill Step Assist by Bottersnike

Adds uphill step assist. Make sure to turn OFF Auto-Jump in controls.

Uplink by DotDash

Adds Discord Rich Presence to Minecraft!

Uplytra by GiantNuker

Press Jump and Sneak to go faser and slower with your elytra!

Upside Down by UpcraftLP

Upside Down Custom Client

Uramod

Des minerais

UraniuCraft'm by TheeAnonymousOne

You can craft a bunch of stuff with uranium. This mod is in beta release so just expect a few bugs.

Uranium Big Reactor by joserobjr

Adds IC2 support to Extreme Reactors.

Uranium Mod by JMBatman

Adds in various uranium items, armoor and tools!

Uranium Reenriched mod by CsokiCraft

Continuation of the old Uranium mod

Uraniumcraft

修正しました…

Usable Magma Block by Kyrdenth, MCreator

A Use For Magma Blcoks

Usable Magma Block Weaker by Johnskullmaster, MCreator

Enter short description here

UsagiShield by ペコリン

結月流防御術