WorldEdit
sfan5

In-game world editor. Use it to repair griefing, or just create awesome buildings in seconds.

Protector Redo
TenPlus1

Lets players craft special blocks to protect their builds or disable PVP in areas.

Handle Schematics
Sokomine

A library to make creating and placing saved areas easier.

Edit
Johannes Fritz

Allows copying, pasting, filling, deleting, opening and saving 3D areas

Modgen
BuckarooBanzai

mapgen mod creator

WorldEdit Additions
Starbeamrainbowlabs

Extra tools and commands to extend WorldEdit. Currently has over 22 commands!

Areas
ShadowNinja

Areas is a advanced area protection mod based on node_ownership.

Terraform
x2048

Adds terraforming tools to your creative toolbox (WIP)

Tools Using the Node Damage and Repair System
Noodlemire

Overrides pre-existing tools to make them cause persistent node damage.

Entity Modifier
j8r

Modify the model and size of entities, including players.

Streetbuilder
seckl

Build a street from given points

Map Tools
Calinou

Adds various special versions of normal blocks, tools, and other map maintainer tools.

WorldEdit Maze Generator
wsor4035

A maze generator

NextGen Bedrock
StarNinjas

Adds an indestructible bedrock layer at the bottom of the world.

Really Flat
rdococ

Generates superflat terrain in whatever material you choose.

Internet Relay Chat
kaeza

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

Extruder Tool
fgaz

Adds an extruder tool that can extend continuous surfaces towards the node face that was clicked

Mapserver
BuckarooBanzai

mod for the mapserver

Public teleport location bookmarks
Hybrid Dog

Add commands to manage public positions of interest

Playtime Recorder
Lejo

Use /playtime to get the time you played

Discord-Minetest Relay
archfan7411

Mod + external program providing Discord relaying and commands.

Cleaner
AntumDeluge

Remove/Replace unknown entities, nodes, & items.

WorldEdit Undo
Hybrid Dog

Undo and Redo executed WorldEdit chat commands

Cinematic Camera
x2048

Commands for cinematic camera moves.

Map Fixer
Gaël de Sailly

Fix some map errors (flow and light problems)

Remove Unknowns
Clyde

A small tool to help you clean up your world of unknown-blocks.

mg_earth
ShadMOrdre

Lua mapgen with many options.

Jean's Economy
Jean3219

Full Economy for Servers like, paying, individual bank statemants, daily rewards, easy api for modders, easy integration with other mods ...

Protector Blocks for Area Protection Mod
1F616EMO

Protector Block, but using the Area Protect APIs

Automatic Cave Lighting
Hybrid Dog

Add two chatcommands to automatically light up dark places (e.g. caves) with lighting nodes such as torches.

doorbell
Miniontoby

A doorbell mod with sound

Permatime
ROllerozxa

Set the day of time cycle to a certain time permanently.

Debugging Console
sorcerykid

Provides an in-game HUD to easily monitor debug output

Mapsync
BuckarooBanzai

Synchronize the ingame map with a lua-backend

Superpickaxe
Hybrid Dog

A tool to remove any pointable node and reveal debug information

Simple Commands
enchant97

Adds simple chat commands

Place Node Command
1F616EMO

Add `setblock` and `place` command

Protector Blocks
cheapie

Simple protector block for ShadowNinja's areas system

Mover
ChimneySwift

Adds a tool that makes moving nodes containing metadata such as chests and protection blocks extremely simple.

Voxelizer
LMD

Turns 3D models into astonishing voxel builds.