TransCryptor
Flay Krunegan

Text to Binary, Binary to Text, Text to Morse, Morse to Text, Binary to Morse, Morse to Binary.

Nitro Digger
nri

Adds a tool that removes nodes quickly.

FS51
Luke

Compatibility layer for formspecs

Tools for Admins
soeren

Tool for adminstrator

Snow Cones
GreenXenith

Some simple flavored snow cones.

Get Biome Data
ROllerozxa

Get biome data from core.get_biome_data

My Blocks
Don

Special Blocks

NodeCore Flood
Hussell

Water floods caves

Colourful Ladders
Itz-Noah

40 colourful wooden ladders

Playerfactions
mt-mods

A simple mod which allows player created factions. Not very useful on its own, it becomes very powerful when combined with other mods.

Fragments
Amaz

A mapgen with a goal, with things needed to advance to the next level.

Plastic Box
Starbeamrainbowlabs

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

Nyan Cat Redo
Blocky Player

nyan lazer, nyan soda and sugar. What's not to love?

Player IP Log
simondanerd

Mod for any game which logs what users join, and records their IP address. Content saved as a txt file in the worlds directory.

Geminti
IlzumiZeminori

Gemini integration into Luanti chat

Cornet
dagm

Torture players with a cornet!!

Vignette Redo
kestral

Optionally place a vignette filter over the screen.

Crafty Arts
AirplaneMan

Arts and crafts supplies

@-Chat
orwell

Adds an alternative Private Message (PM) system

Touch
Skamiz Kazzarch

Orient yourself in the darkness by touch.

My Torches HD
Don

Changes default torches to ones that burn out and cause damage

Temporary Passwords
1F616EMO

Assign temporary passwords to accounts

Prop Hunt Modpack
Jo5629_

Transform into nodes and with a minigame.

Batmod
Don

Fun mod that is about bats

Pattern Blocks/festive Blocks
Eternal_plasma

Adds New Bright Blocks

Chat Visual
Itz-Noah

Need a way to distinguish between staff and players?

Fakery
iarbat

Adds counterfeit diamonds and other fake precious materials.

Dialogs
1F616EMO

Dialogs with options

Playerfactions Ext
IRI

extension of Playerfactions which adds sub-commands that allow you to teleport, give/withdraw privs and/or items to all members of a faction at the same time or for one player in a faction.

NodeCore Runestones
Winter94

Play games of chance, or decorate your builds!

Debugging Console
sorcerykid

Provides an in-game HUD to easily monitor debug output

Breadcrumbs
FaceDeer

Path marker signs for use when exploring a twisty maze of passages that are all alike.

Complete and Total Lua-Only Inventory Rewrite
Noodlemire

Creates a completely custom inventory system, which doesn't rely at all on any of the usual UserData objects.

My Blueprint
Don

Easy way to layout your build

Envelopes
archfan7411

Write and address an envelope to another player!

CentralAuth
1F616EMO

Player account unification across Luanti servers

Anti Exploit
LMD

Protects against exploits

Lockbox
Jo5629_

Library for cryptography/encryption functions.

Oil lamps
ademant

Create oillamps with oil from leaves (basic_materials) or create oil with seeds.

Beamer
Clyde

Beam items or nodes from your inventory to the inventory of your friend.