Underground Survival Lighting
Arkatron

If you like underground light in survival, use this mod, it can help that.

Spectator Mode
jp

Allows you to watch other players in their 3rd person view.

My Lava Sponge
Don

Soaks up lava

Scraps
Goops

Allows to recycle metal tools

Blood Bane Sword
Blocky Player

OP sword for moderators. In memory of an old teacher, who had a mod similar to this on a private server.

More Coral
Nathan.S

Adds coral in more colors.

Petards
IlzumiZeminori

Miscellaneous pyro things

Sticks Stones
MikeRedwood

Makes Sticks from leaves and scatters small stones

Math blocks
Giulio

Adds decorative math blocks to help in teaching

Skates
Vasiliy

A simple ice skating.

playervault
bookgirl

A personal and admin-accessible player vault.

Spawn redo
cathaya7d4

Drop-in replacement for default/spawn for more third-party biomes

Rotting Wood
Polynium

Causes wood to slowly rot while exposed to water

My Blocks
Don

Special Blocks

My Cobble
Don

This is a simple mod that lets you turn cobble into gravel and gravel into sand

Livetools
AiTechEye

Craft tools which have a life of their own - they can fight, dig, or place for you

LWComponents Spawners
mt-mods

Register spawners for lwcomponents.

Hardcorebrix
drkwv

Adds durable building materials that won't break on a first dig.

bridgemaker
mike.monkeybiter

A refillable machine to easily create simple block bridges across caverns and valleys.

Devcalner’s GUI Enhancements
Devcalner2

A collection of images that enhance the textures of GUI

My White Block
Don

a white block

TerraContent Crimson
AirplaneMan

Introduces the Crimson to your worlds.

Basket Cooking
1F616EMO

Cook all stuffs inside a basket with electric furnaces

My Rocks
Don

Places rocks around the world

3D Spikes
Groin

Adds spikes to the game.

Drawstruct
Xenon

Draw or generate random structures

rtp
bookgirl

Random teleport commands (/rtp and /wild)

Colored Leaves
Otto

Adds several colors of leaves

TP Gate
AiTechEye

Teleport through the gate

Crafty Arts
AirplaneMan

Arts and crafts supplies

Roadway
X17

Adds simple roads in 4 sizes.

Respawn Kit
Deadlock

Adds a "respawn-kit"-Chest. A Copy of everything you put in it, will be given to you on respawn. (With configurable Black/White-List)

plots
bookgirl

plot world system inspired by PlotSquared for Luanti

Noriel Sylvire's Minerals Core Modpack
Noriel_Sylvire

An API for automatically registering recipes, nodes and ore generation.

Geodesy
SFENCE

Geodesy tools and items

Explosion proof obsidian
Miner34

Adds an explosion proof obsidian.

Renewable Desert Stone
Emandac

A crafting recipe to craft desert stone.

Kill history hud
Giga_M

adds a death history on the screen

itemshelf (Fork)
nac

Generic item shelf with 3D items on display

Beautiful Boulders
regulus

Procedurally Generated Rocks with (pretty) Accurate Collision Boxes