Underground Challenge
Hypernoot

Explore all 62 underground biomes!

Raw Ore Blocks
Silver Sandstone

Adds block forms of metal lumps.

Fire Master
Flay Krunegan

Fire Master is a powerful weapon that can shoot fire

Coconut Trees
Neuromancer

Adds coconut trees with edible coconuts & thatch blocks

GC Sprint
stellarorion

A simple sprinting utility without the need for food consumption :^)

Axis Tools
mt-mods

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

Rain Barrels and Wells
Piezo_

Replaces overpowered "water generators" with a unique water-harvesting system

Lava Ore Gen
Coder12

Makes the lava turn stone into ore over time.

Stairs Recycle
DumbDave961

Turn stairs into slabs, different stairs, or back into blocks. Smelt cobble stairs into stone stairs. Highly recommended for Oneblock survival.

Kitty/Kitto Ores
nemokitty9

Nemokitty9's own ore pack. Includes Tools!

Asbestos
AirplaneMan

Useful Fire Proof Asbestos for your world

Sparking Wand Mod
Olaf

Craft a wand with which you can cast a lightning spell. Great for discovering caves.

Placeable Buckets for Catching Rainwater
Noodlemire

Allows empty buckets to be placed as nodes in order to collect rainwater.

Gauges
Calinou

Adds health and breath gauges above players.

Basic Anvil
MikeRedwood

Adds an easy tool repair craft

Sieves
AwesomeDragon97

Adds sieves that are used to separate (occasionally) valuable debris from sand.

Multitools
ChimneySwift

Adds a series of multi-purpose tools

Lifesteal Mod
Jo5629_

Provides a lifesteal mod.

Utilities for Underch - extension pack
Hypernoot

Extend the Underground Challenge by miscelaneous utilities and change some recipes

Random Cool
pl608

Adds random ores on lava cool

Bed Notifications
Bob64

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

Aether
iarbat

Adds a hard to obtain yet powerful substance called Aether.

Missions
BuckarooBanzai

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

Sailing
cakenggt

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

Hard Trees
octacian

Require tools to break trees and introduce beginner-tier rock tools.

Fancy Place
DragonWrangler

Better block placement system that allows you to place blocks even when not pointing at the connecting face.

Teacher: Locked Chests
1F616EMO

Tutorial for MTG Locked Chests

Unprotector
Kimapr

Bypass Protection Sorcery in survival

Infinite Wood Mod
thehumanarachnid

You can now get infinite wood in survival

Meze
Calinou

A special ore that kills you when mined.

Grave
ElCeejo

Adds an eerie biome with multiple mobs.

Wings
xXNicoXx

Wings is a mod whiche allows server owners to give players fly privs while holding the wings (Like binoculars) made by xXNicoxx

Power Guns
shaft

A mod that adds laser guns and a force gun

X Bows Extras
SaKeL

Adds more bows/guns and arrows using X Bows API.

LootChests Modpack
mt-mods

Modpack adding a lot of various loot containers across the world to be found and providing an API, resources and integrations for other mods

Dragan-uisge (Water Dragon)
Homiak

Adds powerful Water Dragons, useful craftitems and Draconic blocks.

X Spawners Mobs
SaKeL

Adds mob spawners.

Technic Armor
mt-mods

Adds armor made from lead, brass, cast iron, carbon steel, stainless steel, tin and silver

Portal gun
AiTechEye

Portals and stuff

Sprinting
xXOsielXx

Allow sprinting/running with double tap