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UltisMod

Ulti's Mod

Ultra Addons by Andrey96

Some features for UltraMC servers

Ultra Amplified Mod by TelepathicGrunt

A world beyond amplified world type! Discover incredible landscape! Loot filled structures! And many boosted Biomes along with the End and Nether in the Overworld!

Ultra Compression by SamRaven2

Make all the things smaller.

Ultra Crafting by kidsfarm

Ultimate Crafting Recipies and cores

Ultra Hard Coremod by Mrbysco, Svennieke

A UHC mod made for Modded Minecraft.

UltraDimMod

This is Ultra Dim Mod

UltraDimensionalitySuit

This is Ultra-dimensionalitySuit Mod

UltraDimensionalityTools

This is Ultra Dimensionality Tools mod!

UltraGear

A mod that adds awesome gear you craft with blocks

UltraGemsMod

Gems, armors and tools

UltraMine PrivateRegions

UltraMine Private Regions

UltraPistol

Adds an UltraPistol To Your Minecraft World

UltraSoftCore by Szernex

UltraHardCore's little brother, aimed to make life harder, but not too hard.

UltraTech by cout970

Ultra technology for minecraft

UltraTools

Awesome tools for an awesome person!

Ultra_Ore

Ultra ore!

Ultraman

Development by MineC

Ultramatrix

A WIP mod indev.

UltramineServer by ExampleDude

lang file for UltramineServer

UnDeath! by nekosune

Ever wondered if there was life after death? wonder no more

UnKnownMod by Exysting

Mod for UnKnown Team.

UnLogic by F1repl4ce

A 'Random Things' type mod that adds lots of useful content.

UnLogic II by The_Fireplace

A mod that adds lots of random and useful content.

Unborked by SquidDev

Makes ComputerCraft 1.80pr0 less buggy for 1.10.2

UnbreakEn Mod by MJaroslav

Enchantment that will save your instrument.

Unbreakable++ by Sangam1

Adds the ability make stuff unbreakable!.

UnbreakableTools

This is an example mod

Unchantment Table by Teotw

Retrieve encnantments from items. Built: 11/12/13 09:43 PM

Uncharted by Epidra

Your favourite Biome Panel

Uncle Jeff's Nethergem Mod by Jeffry Fisher

An apex gem for the nether: As hard as diamond but as enchantable as gold.

Uncle Jeff's Paintings Mod by Jeffry Fisher

16 whole sets of paintings separated by metadata

Uncle Jeff's Pressure Plates Mod by Jeffry Fisher

For each class of mob, a pressure-plate that discriminates among mobs in class

Uncle Jeff's Sensors by Jeffry R Fisher

A moon-phase sensor and a weather sensor

Uncle Jeff's Walls Mod by Jeffry Fisher

A new metadata-variant set of rock walls

Uncle Tomo's Minecraft Mod by Ablaze, Xornop, other friends

Bringing Uncle Tomo to your Minecraft world!

UncleGrandpaMod

Googmorning!

Uncomplication

This mod just adds the old version of the new IC2 recipes.

Uncrafter by Jannis234

Did you craft something and you don't need it anymore? Use this mod and get your resoures back!

Uncrafting Mod by Ms_Raven

A simple mod that lets you convert items into the materials used to craft them.

Uncrafting Table by jglrxavpok

Did you ever want to uncraft an item (like your 5 hoes made by error) ? Now, you can do it against 5 levels of XP!

UncraftingMod

This is an example mod

Undead Crafting by Bjf1152

Adds many new things to the game to make use of bone, rotten flesh, and other hostile mob drops.

UndeadPlus by TechGuy543, GuitCube, RandumbDude, MrCompost, Tyler15555, Others

Undead+ adds a range of threatening new mobs to keep your Minecraft world alive and exciting during the night and while you're adventuring through caves.

UndeadUndeadnoMi

Fruta da Imortalidade

Under The Sea by Kashdeya

Adds Rocks and Seaweed for the Void Island mod.

UnderCraftMOD

Ceci est le mod d'UnderCraft

UnderMod

MOD BY UNDER

Underarmor

Armor that goes under your players skin.

UndercastMod by skipperguy12, Genius_Fraser, GoldBattle, palechip, xIGBClutchIx, flv92, molenzwiebel

A custom made mod that tracks gameplay stats and has custom guis made for the oc.tc servers

Undercraft by ThePsionic

Minecraft meets Undertale

Underfell

This is still a demo but this is what I like to call the brother update

Underground Biomes by Exterminator Jeff, Grom PE

Adds underground biomes composed of layers of new rock types

Underground Ocean by Reoseah

Small mod that adds large caverns filled with water to world generation.

UnderlineFix by Axer

Fix the bug which has caused unable to type underline on OSX.

Underp Hangables by masa

Fixes the derpyness of the dropped items from Paintings and Item Frames when they are broken.

Undertale

Sorry

Underwater Chest Bubbles by Squirtle8459

Upon opening chests underwater.. creates bubbles..

Underwater Rails by Hennamann

Made for Modjam 5 adds 2 new rail types and tools intended for use underwater.

Underwater Utilities by Shadowfacts

Helpful utilities for working underwater.

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!!!