Pink Lava
TenPlus1

Adds pink lava to certain depth of map with new mahogany obsidian block

Warp Potions
Shara

Cost per use potions teleport system designed for survival servers.

Plasterwork
Sokomine

Add colored plaster coats to nodes

Archipelago for Citadel
Warr1024

Connect Citadel to Archipelago Multi-world Randomizer

playervault
bookgirl

A personal and admin-accessible player vault.

Ruby Tools+
ReinPlayz

Adds ruby ore, ruby tools, and ruby blocks balanced around diamond-tier gameplay.

Mines
ApolloX

Regenerating terrain

Dirt Tunneler
Neuromancer

Makes dirt deeper and you can tunnel through it just by walking through it. Press spacebar/shift to tunnel upward/downward with auto placed ladders.

Cute Pie
Don

Cute blocks

Player Speed
Boot

Displays the player's speed (walking, running, falling) in m/s and km/h in the HUD.

My Torches
Don

Changes default torches to ones that burn out and cause damage

DragonEggLock
mi.sh

You can lock a Dragon Egg so it doesnt teleport away

Colored Leaves
Otto

Adds several colors of leaves

Color my items!
Sofik5800

Color your items with one command: Color me!

Make fighting harder by allow damage to be done to attached player (player in cart, on boat, etc)
SFENCE

Limit defensive potencial of some entities, player can be attached to.

TP Gate
AiTechEye

Teleport through the gate

Rainbow Source
Shara

Adds coloured water.

Hades Revisited back-compatibility
SFENCE

Make old Hades Revisited world compatible with new versions of Hades Revisited (from version 0.7.0 to 0.13.0).

Rivets
Silver Sandstone

Adds rivets for decoration or locking blocks.

Sugar
X17

Adds eatable sugar made of papyrus and a sugar block

Minetest Systemd (API)
Piezo_

Debugging utility and compatibility tools for server owners and/or modpack creators

aw_edificiosdecuba_habana
JALdMIC

It has some buildings based on those in Havana

3D Spikes
Groin

Adds spikes to the game.

Drawstruct
Xenon

Draw or generate random structures

Geminti
IlzumiZeminori

Gemini integration into Luanti chat

money3
Luke

Adds /money.

timehud
bookgirl

Minimal HUD timer API

rtp
bookgirl

Random teleport commands (/rtp and /wild)

TerraContent Crimson
AirplaneMan

Introduces the Crimson to your worlds.

NodeCore Fossil
Winter94

Discover fossils, oil, natural gas, amber, and more!

Quartz Glass for Stellua
vejou

Adds quartz-glass combinations for colored glass blocks

NodeCore Adamant: Revised
Winter94

Adds Adamant, a new metal ore, deep underground/

NC Pumbob
Winter94

adds carvable and sealable pumice bobbers/floaters

Star
Wiz

A* Pathfinding algorithm implementation

Smart Chat
Clyde

A new, lightweight, simple and modular Chatsystem

Portal Rail
BigBear

Minecart rail that teleports exactly 500m in direction of travel

Vote Night
Holly Mae

Allows players to vote for it to be night

NucleoTest
DarkXWolf17

Battle Royale-like game. Provides an API and a reference implementation. Highly radioactive. Work in progress.

Cave explorer tool
SFENCE

Cave explorer tool to use acoustic signals for undergound exploring.

No Melterns, no tools
InfiniteCoder01

You can't craft tools without melters now. Progression becomes harder