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!
Unclunkify by phantamanta44
Makes life a little better.
Uncomplication
This mod just adds the old version of the new IC2 recipes.
UncraftableThings
My first Mod
Uncrafter by Jannis234
Did you craft something and you don't need it anymore? Use this mod and get your resoures back!
Uncrafting Blacklist by DoomRater, Noobanidus
Prevent items from being uncrafted in the Twilight Forest uncrafting table.
Uncrafting Dropper by Luis Cuesta
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.