Luablock
LC Creations

Adds blocks that can execute lua code. Admin purposes only.

Wrench - node rotation tool
Argos

A better screwdriver.

Weapons API
Stix

Adds an API to easily register custom weapons

Upgrades
niwla23

Adds effects to players for a short time

Interactive Item API
Jose_ManuelS18

Provides an API to make it easier to implement items' inner workings.

Waste
Jolesh

Adds Waste and ways to recycle it into useful resources

Voxelizer
LMD

Turns 3D models into astonishing voxel builds.

Item Holders
Jose_ManuelS18

Adds 'Item Holders', blocks that hold your items in display, also provides a API.

Quest Framework
TeTpaAka

Simple framework to define quests.

8Segmentdisplayblocks
unacceptium_core

8 segment digital display as blocks

Tinted Glass
1F616EMO

Colored glass

FS51
Luke

Compatibility layer for formspecs

World Borders
argyle

Add impenetrable barriers to the sides and bottom of the world.

MineClone2 Build Limit
AFCM

Add a build limit to MineClone2

Batch Screwdriver
niwla23

With this you can rotate all nodes in a row at once

Rebreather
ApolloX

Breath underwater with this item in hand

Bed Jumping
playduin

You may jump on the bed

List Items Chat Command
AntumDeluge

Chat command that lists registered items & entities.

Fake Player
MineWorlds

this adds special fake players with heavy customizable features, needs fake_master priv to use commands and "the controller"

City CommodityMarket
X5Dragonfire

Adds simple CommodityMarkets for city's towns etc.

My Paint Extras
Don

Allows you to paint dirt, gravel, wood, trees and more.

Pineapple
Neuromancer

Pineapple crop for tropical biomes

Nebula Combat
JoinNebula

A combat customizer for competitive servers: customize knockback, attack interval, attack distance, damage multiplier, etc.

Mailbox
1F616EMO

Inbox for items

Tortou
LibraSubtilis

Turtle graphics, hyperloop travelingsystem and cubic mobs.

Sling
tacotexmex

Sling enables item stack and single item throwing of any item.

Scripted World Editor
Neuromancer

API that allows you pass in scripting tables to fill a series of shapes of different sizes with different nodes

Vision Lib
mt-mods

Common library for PolySaken's mods.

Sneeker
AntumDeluge

An explosive nuisance.

NodeCore Bugs
Winter94

Adds A Variety Of Bugs To NodeCore

Mine
SkyBuilder1717

Adds many types of mines

NodeCore Stalactites & Stalagmites
Winter94

Generates Stalactites and Stalagmites in caverns underground.

Minetest Game Random Content
AirplaneMan

Adds random content with no particular theme

Keyevent
DS

Adds an event for when player presses a key.

action queues
fluxionary

provides an API for queuing things for batch processing w/ various ways to specify the batch "size".

Tune JIT
rudzik8

Tunes LuaJIT parameters to improve server performance by preventing constant GC

Plastic Box
Starbeamrainbowlabs

Adds a recolourable plastic box. Fork of @cheapie's version with improvements.

Fake Solids
Holly Mae

Creates fake blocks that can be walked through.

More Mese Post Lights!
1F616EMO

Add more mese post light

Pencil Redo
1F616EMO

Tool to edit infotext of nodes