Skygrid
ROllerozxa

Custom skygrid mapgen.

World Settings
Codiac

Supports per world settings in Luanti games and mods

Fast Build Tool
playduin

Tool for fast box building

Cloaking
Luke

Allows admins to become invisible and appear as if they are not in-game at all.

Worldedge
Don

Teleports the player to the other side of the world when they reach the edge.

Fbt WiTT
Forburnt

WAILA-like mod (a rewrite of WiTT by MightyAlex200)

Basic Anvil
MikeRedwood

Adds an easy tool repair craft

Areas' helper tools
rangeTonic

Convenient tools for Areas protection mod

Better Randomizer
ThePython10110

Randomizes node drops, mob drops, and crafting recipes

The Confluence
MisterE

A luamap example - a small (500x100x500) Island in the middle of the ocean with 4 rivers that run from the center to the sea.

Node Touch Action
Neuromancer

Pass in a node name and a function, and every time a player touches that node, the function happens

BiomeDB
EmptyStar

Searchable biome database for robust biome selection

Extended Placement
gamefreq0

Allows placing nodes below/behind the closest node to where you are looking, when you're looking at the air where said node would go.

Nebula Anti-Cheat
JoinNebula

Cheat detection and prevention

Sieves
AwesomeDragon97

Adds sieves that are used to separate (occasionally) valuable debris from sand.

Digiline Stats
Darin755

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

item_magnet
fluxionary

a magnet for picking up items

Mystical Tools
liteninglazer

tool progression past diamonds and adds mystical staffs and wands

Mob Crab (Beta)
Can202

Adds Crabs.

My Scaffolding
Don

Scaffolding to help you reach high places

Living Grass
karlexceed

Adds a simple lifecycle to grass

Saw
Sofik5800

Saw that deleted from MultiCraft

Server Rules
CrazyladMT

Adds a rules interface.

Variety Fork
awuuwa

Fork of Atlante's Variety

Punch And Place Particles
epCode

Makes satisfying particles when placing a node or punching one. (viewable by all players)

Gauges
Calinou

Adds health and breath gauges above players.

Climbable Trapdoors
ZenonSeth

Makes the wood and steel trapdoors climbable

scaffolding (flux's version)
fluxionary

scaffolding, to help in building projects.

Tomahawks and Throwing Knives
Pixelated

Introduces new weapons

Sounds
AntumDeluge

A set of free sounds & API.

Mod list
SkyBuilder1717

Adds new UI for /mods command

Classroom
rubenwardy

An easy way to manage students in-game, with support for bulk actions and macros.

Name Generator
FaceDeer

A lua library for generating random names based off of rulesets and syllable lists.

Reinforced Diamond Tools
ImAlreadyHere

A sword and a pickaxe that are really strong and can be crafted with diamond blocks and sticks.

Stairs Recycle
DumbDave961

Turn stairs into slabs, different stairs, or back into blocks. Smelt cobble stairs into stone stairs. Highly recommended for Oneblock survival.

Clay Bricks
AwesomeDragon97

Adds colorful clay bricks.

Extreme Randomizer
NO11

Randomises crafting, mob and block drops.

Minetest test framework
BuckarooBanzai

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

Placeable Buckets for Catching Rainwater
Noodlemire

Allows empty buckets to be placed as nodes in order to collect rainwater.

Infinite Chest
Dragonop

Adds a configurable chest that gives an infinite amount of something.