Skyblock: Zero
zanderdev

Start from absolutely nothing in a skyblock world. Time is your resource.

Height Limit
SkyBuilder1717

Adds height limit for servers.

Turtlebots Mod
jmole

Turtle Bots that you can program to build anything! Can be used alongside other Luanti games.

Ubertool Mod
HartRend

Provides a combination pick, shovel, and axe tool capable of extreme function. Tool is also illuminated.

I Have Hands
SURV

Carry nodes/blocks with inventories without breaking them.

Fast Build Tool
playduin

Tool for fast box building

Scaffolding
Semmett9

Adds wooden and Iron scaffolding.

3d Random Walk Blocks
chaosomnium

3d Random Walker Blocks that create interesting structures in the world

Dirt Tunneler
Neuromancer

Makes dirt deeper and you can tunnel through it just by walking through it. Press spacebar/shift to tunnel upward/downward with auto placed ladders.

Repainter and rotator
MatyasP

Add tools for editing node param2 for different color and different rotation

Cozy Lights
SingleDigitIq

Early alpha. Improves the way light sources(torches etc) behave and allows to create huge lights, literal projectors with just a mouse click, light map will be computed for you.

Archaeology
SkyBuilder1717

Adds an looting and API in archaeologing

Handle Schematics
Sokomine

A library to make creating and placing saved areas easier.

NC Pumbob
Winter94

adds carvable and sealable pumice bobbers/floaters

My Blueprint
Don

Easy way to layout your build

new minerals
Giga_M

new minerals for armor and tools,add mineral abysmal, cobalto,adamantita,tugsteno,clorofite,titanium and more uses for obsidian

Lava Furnace for Mineclonia
bgstack15

Furnace that is fueled by nearby lava, for Mineclonia

Boulder Dig
Neuromancer

Creates gameplay for the game Boulder Dig (inspired by Boulder Dash). Find the boulders and gems scattered throughout the regularly generated world. 2nd option is more densely packed levels.

Nodrown
Minisleep

Disables drowning, so you can swim and live underwater forever.

Age of Mending
Sumi

Age of Mending: Sandbox game about building your own world and exploring a new one. Last breaking changes: a40

Fake Liquid
SkyBuilder1717

Adds a fake liquids

ExplorerTools All (Tools place item on right click)
Kilarin

Tools place item in next inventory slot on right click

BridgeTool
Kilarin

Adds a new "bridge tool" that makes placing stone (or glass, earth, or any material) while building a bridge in no-fly mode easy.

Lighting Wand
vibes81

Adds a greedy wand that eats burnable items and uses it to place a light where ever the player points.

Warning: Non-free media.

Automatic Cave Lighting
Hybrid Dog

Add two chatcommands to automatically light up dark places (e.g. caves) with lighting nodes such as torches.

hexcol color picker
Mjokfox

color picker for hexcol

Better Locks
SkyBuilder1717

Adds locks and locked doors

Disable Build Where They Stand
LMD

Disables placing blocks at places where they would collide with a player

Replacements
BuckarooBanzai

Replacement/placeholder blocks intended for schematics

Area Containers
jwmhjwmh

Adds nodes that contain areas in which you can build

scaffolding (flux's version)
fluxionary

scaffolding, to help in building projects.

Geodesy
SFENCE

Geodesy tools and items

Pick And Place
BuckarooBanzai

Pick and place utility

Hopper Compatibility
Bob64

Adds hopper compatibility for other mods like technic, elepower and even connected chests!

Finaluxi
Sere Motsatt

A example for aore API.

portal gun
Giga_M

add a portal gun

Stack Slabs
TumeniNodes

Stackable slabs

Camps
ApolloX939

Bring your base with you

WorldEdit
sfan5

In-game world editor. Use it to repair griefing or create awesome buildings in seconds.

Color my items!
Sofik5800

Color your items with one command: Color me!