Utilities for Underch - extension pack
Hypernoot

Extend the Underground Challenge by miscelaneous utilities and change some recipes

Jukeloopbox
ulla

A simple jukebox that can be used for small looped tracks, or simply to listen to music

Lava + Water > Stone
1F616EMO

Cool Lava into technically special stones for easier cleanup

Multitools
ChimneySwift

Adds a series of multi-purpose tools

Infinite Chest
Dragonop

Adds a configurable chest that gives an infinite amount of something.

Coconut Trees
AwesomeDragon97

Adds coconut trees that appear on beaches

CodeBlock
giga-turbo

Use lua code to build anything you want

Bed Notifications
Bob64

This adds chat messages that tell other players when a player leaves or enters a bed and when players can sleep.

vexcazer
AiTechEye

Ultimate build+mine & admin tool

Candy
Kostivar

Adds candy which you can make from candy ores.

Multiplant
Firefall

Grow Multiplants and get a random seed or flower!

Fast Build Tool
playduin

Tool for fast box building

Trails
X5Dragonfire

Allows you to make paths in grass with ground roller

Titanium
Hybrid Dog

Adds titanium which is very strong and lasts for a long time.

Axis Tools
mt-mods

All the functionality of tinkers construct, but all in your inventory.

Zinc
alerikaisattera

Zinc metal, used for making brass

Missions
BuckarooBanzai

Adds blocks to create missions with rewards, timeout and penalties.

golden_bread
MR_breaddz

golden bread

Bonified
Shqug

New features related to the bones you get from dead players in MTG.

Reinforced Diamond Tools
ImAlreadyHere

A sword and a pickaxe that are really strong and can be crafted with diamond blocks and sticks.

Metallicum
Ludus

The power of Titanium!

Chocolatestuff
lazerbeak12345

Adds edible chocolate tools and armor.

Tomb Stones
Nathan.S

Adds many shapes and styles of tombstones.

HUD Analogic Clock
APercy

Adds an analogic clock to hud

gooey mess reborn
timm

a funny addon that is bigger,better, and a lot more of a goofy time

Basic Anvil
MikeRedwood

Adds an easy tool repair craft

Craftable Lava Blocks
Darin755

Makes Lava blocks craftable

Sailing
cakenggt

Live in a tropical paradise where you can sail, mine coconuts, etc.

visible health bar
Giga_M

adds a visible health bar above the player

Medieval (Fork)
DragonWrangler

an addon to darkage

Lava Ore Gen
Coder12

Makes the lava turn stone into ore over time.

Un-Craft Table
Troodon

Adds an uncraft table

Sumo
MisterE

Sumo Minigame (Arena_lib)

Invisible Wall
X17

Adds a simple invisible block

Bread
Lahusen

Just my favourite bread recipes

Block In Block
TumeniNodes

A silly mod to spark creativity

Ancient Runes
spixi

Ancient Runes

Watershed
paramat

A river / mountain range mapgen

Kudzu
chaosomnium

kudzu (invasive spreading plant) mod, with useful crafts and items

Worldedge
Don

Teleports the player to the other side of the world when they reach the edge.