Random (Useful) stuff
pl608

A library that adds well... Random Stuff

Flowing Concrete
DumbDave961

Adds flowing concrete that hardens over time. Cheap alternative to lava cooling.

node entity queue
fluxionary

a queue for spreading out the generation of node entities over multiple server steps (smartshops, signs, itemframes, etc).

Nitro Digger
nri

Adds a tool that removes nodes quickly.

Player Settings
1F616EMO

Player-specific settings

Pencil Redo
1F616EMO

Tool to edit infotext of nodes

Minetest Emotions
ResendeTech

Adds new feelings in the form of blocks

Boulders
Neuromancer

Adds pushable boulders which spawn in dirt & stone. They tumble when they wind up on top of each other and cause damage when they fall on you.

warn
Neocraft1293

simple mod to warn players

Luablock
LC Creations

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

Block Bomber Mg
MisterE

Blockbomber as an arena_lib minigame

Fraktur (alphabet digits letters)
shaft

Adds a whole set of Fraktur type metals in the form of nodes.

Seekblock
empeeu

Minigame where players seek a different block among a clutter of other blocks.

mTimer
Linuxdirk

Ingame timer for showing current playtime, current day time, ingame time, etc.

SmartFS
rubenwardy

A library to allow mods to make Formspecs, a form of GUI, easily.

hexcol color picker
Mjokfox

color picker for hexcol

Unified Stamina API
TestificateMods

Provides a universal API for handling different mods that provide a stamina bar

Shifter Tool
jwmhjwmh

Adds a tool for moving nodes as pistons would

Hbdrunk
UnchainedDevelopment

Adds intoxication effects and HUD bar to display intoxication level.

Dais Ex Machina
Warr1024

An other-worldly platform to preserve some of your stuff across map resets for NodeCore

Xiangqi
Y. Wang

Xiangqi (Chinese chess)

3d Random Walk Blocks
chaosomnium

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

AFK Indicator
1F616EMO

API to check player AFK status

Attachable Bomb(ctf)
pl608

Adds a bomb that can be attached to players and go off on timer

MineClone2 Welcome HUD
AFCM

Show welcome bossbar in the HUD

Death Coords
Niden

Show Death Coordinates

TP Gate
AiTechEye

Teleport through the gate

Timed World Modifiers library
karamel

Environmental ABM that could be triggered on a very wide range of nodes but only a few at a time.

Chatcommand Library
LMD

Library for registering chatcommands.

Knives
ApolloX

Adds various knives with extreme damage

Protector Redux
sorcerykid

An efficient and flexible node-based protection scheme for multiplayer worlds

Skyhell Together
Kimapr

Put all skyhell players on one shared island (NodeCore)

Edutest Chatcommands
zeuner

Provides chatcommands for the educational staff.

Liberties
lizzie

A minimalistic approach to enabling the game of go in nodecore.

Discrete Player API
Hypernoot

A library for games which attaches players to node grid

Obdy
Sires

Adds some pretty OP tools :)

evolving_pickaxe
Neocraft1293

a mod that adds a pickaxe that improves when used

Diamond Arts
Teltalila

Adds decorational fake diamond blocks.

Spectator Mode
jp

A mod for Minetest allowing you to watch other players in their 3rd person view.

Flow Extras
lazerbeak12345

An experimental collection of extra widget APIs for flow