Irrigation
monk

Makes dry soil wet for farming

Bed Notifications
Bob64

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

Trails
X5Dragonfire

Allows you to make paths in grass with ground roller

Utilities for Underch - extension pack
Hypernoot

Extend the Underground Challenge by miscelaneous utilities and change some recipes

Basic Anvil
MikeRedwood

Adds an easy tool repair craft

Invisibility Potion
TenPlus1

Craft a potion to make yourself invisible

Chocolatestuff
lazerbeak12345

Adds edible chocolate tools and armor.

Jukeloopbox
ulla

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

Living Grass
karlexceed

Adds a simple lifecycle to grass

vexcazer
AiTechEye

Ultimate build+mine & admin tool

Kitty/Kitto Ores
nemokitty9

Nemokitty9's own ore pack. Includes Tools!

Watershed
paramat

A river / mountain range mapgen

Sieves
AwesomeDragon97

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

Infinite Chest
Dragonop

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

Axis Tools
mt-mods

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

Lava + Water > Stone
1F616EMO

Cool Lava into technically special stones for easier cleanup

Multitools
ChimneySwift

Adds a series of multi-purpose tools

Fast Build Tool
playduin

Tool for fast box building

File Cabinets
danil_2461

Adds the file cabinets from Windows.

The Confluence
MisterE

A luamap example - a small (500x100x500) Island in the middle of the ocean with 4 rivers that run from the center to the sea.

Loose Rocks
eduardomezencio

Adds loose rocks which generate randomly on the surface.

potal launcher
Soundwavez

Potal Launcher

Random Cool
pl608

Adds random ores on lava cool

ponti
ulla

brige/door

blackhole containment box
Soundwavez

cool swirvy gravitational blackhole boxes, that can be used to "ahnialate" enemy bases, or for "deforestation" aah i love abms! (extra dramatic!))

Mistere's Adventure Map Island Creator
MisterE

A 1000x1000 canvas for your imagination

gooey mess reborn
timm

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

Titanium
Hybrid Dog

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

Hard Trees
octacian

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

book_runner
fluxionary

run a command and put the output in a book

void grenade
GigaByte

add an void grenade

Craftable Lava Blocks
Darin755

Makes Lava blocks craftable

Nyfty Blocks
Ryft77

Adds some nifty blocks

Ham Radio API
VinAdmin

Add-on for the Ham Radio mod that allows you to implement the transmission of messages between servers via web api

UFO wreck
Irremann

UFO wreck

Tsalagi_letters_modpack
yona

Tsalagi Letters

visible health bar
GigaByte

adds a visible health bar above the player

City Block II
sorcerykid

Disables use of water and lava buckets within a designated area

challenge
josegamestest

challenges to create route challenges or to train flight

Block In Block
TumeniNodes

A silly mod to spark creativity