Lifesteal Mod
Jo5629_

Provides a lifesteal mod.

Aether
iarbat

Adds a hard to obtain yet powerful substance called Aether.

Zinc
alerikaisattera

Zinc metal, used for making brass

Clay Bricks
AwesomeDragon97

Adds colorful clay bricks.

SkillsFramework
domtron vox

SkillsFramework provides an API for creating and managing skills.

City Block II
sorcerykid

Disables use of water and lava buckets within a designated area

Botic Font
Pyrollo

Botic font mod for Font API

Internet Relay Chat
kaeza

Connect your server to an IRC channel, and install irc_commands to control the server from IRC

Pumpkinspice
GreenXenith

Adds pumpkinspice stuff.

Greenscreen
ROllerozxa

Brightly coloured nodes for chroma-keying. (greenscreens)

Epic
BuckarooBanzai

Enhanced Programmer for Ingame Control

Digiline Stats
Darin755

A mod that adds a few digiline blocks to get server information

NB More Concrete
NameNotQuality

Adds more concrete to NodeCore

Bare bone MT
sebpro_3

texture pack with a minecraft bare bone look

visible health bar
Giga_M

adds a visible health bar above the player

Living Grass
karlexceed

Adds a simple lifecycle to grass

WC Strata
Winter94

Exploring the NodeCore underground has never been more colorful.

Craftable Lava Blocks
Darin755

Makes Lava blocks craftable

Minetest test framework
BuckarooBanzai

Provides an api to register test functions for integration-tests.

Ejection
Yof

A unique movement mechanic resembling strong jumping.

Inspector
sofar

An in-game tool to inspect node parameters and metadata.

Sumo
MisterE

Sumo Minigame (Arena_lib)

Blockwatcher
Cashia

Logs block edits and allows rollbacks for admins

Nebula Anti-Cheat
JoinNebula

Cheat detection and prevention

Scriptblocks 2
rdococ

Adds nodes that can be used to build reusable programs.

Cooperative Factions
skiscratcher

Adds factions, allowing players to team together

Un-Craft Table
Troodon

Adds an uncraft table

Map Octree
giov4

A library for saving large world regions as compressed octree snapshots. Useful for schematics, backups, and fast node queries on huge areas without exhausting server memory.

Repixture Crafting Compatibility
Silver Sandstone

Converts crafting recipes to be compatible with Repixture.

Tsalagi_letters_modpack
yona

Tsalagi Letters

voxelmanip experiments and remade math mandelbox mapgen
chaosomnium

Voxelmanip mapgen with strange layered zone experimental mapgens.

Rain Barrels and Wells
Piezo_

Replaces overpowered "water generators" with a unique water-harvesting system

Minetest Extended
PetiAPocok

The extended version of the default Minetest Game.

Warning: Non-free media.

debuggery
fluxionary

debugging tools for server admins

Manhunt
DarkXWolf17

Play with your friends and enemies in this exciting manhunt game.

Balloon Bop
MisterE

Based on ExeVirus's Balloon Bash Ludum Dare submission, comes a minigame for Arena_lib all about Popping huge quantities of balloons and not letting them touch the ground.

Multitools
ChimneySwift

Adds a series of multi-purpose tools

2048
SkyBuilder1717

Adds simple 2048 game

Sparking Wand Mod
Olaf

Craft a wand with which you can cast a lightning spell. Great for discovering caves.

Bed Notifications
Bob64

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