Unify Ore by Dr0n1k
Adding ore, blocks, ingots and etc from useless materials mods
Unikitty Mod by Pauls Mods
Adds Unikittys which can be tamed as pets & a very OP armor.
UnimCraft
UnimCraft adds new Items and Blocks!
Unique Crops by bafomdad
Unique crops, unique growth, unique drops
Unique Enchantments Base by Xaikii, Speiger
Unique Enchantments Base Mod
Unique Enchantments Battle by Xaikii, Speiger
A Set of Unique Battle Enchantments
Unique Enchantments Utils by Xaikii, Speiger
A Set of Unique Utility Enchantments
Unique Ores
A mod that adds unique ores, items, and machines
UniqueFoodStalksMod
Adds New Food Items
UnitedCult
The second update in the series.
Unity by RandomByte
Unity items by Gagantorian
adds cosmetic walls to minecraft
Universal Bestiary by Lykrast
Gather infos on all mobs in your modded instance.