Electric Screwdriver
skiscratcher

A supplement to screwdriver, to speed up placing blocks in a repetitive way

Select Item
Wuzzy

Allows other mods to add a simple form to choose a single item.

Minetest HTTP API QoS control queue
SX

Improve quality of important HTTP requests by grouping requests into service quality buckets.

CSMT Bots (Obsolete)
Logikí

Add bots to your game for training

Oddly Sized Checkerboard Testnodes 2
erle

Adds oddly sized checkerboard test nodes.

Elepower Fixes
Bob64

This aims to fix some of the problems with the elepower modpack.

chatcolor
bookgirl

hex and bukkit-style chat colors with per-color privileges

Privs Per World for Mineclonia
bgstack15

Automatically grant privileges to players in the nether

Welcome New Players
DiamondPlane

Sends a welcome message to new players

Japanese Name
Logikí

transform your player name to japaNESE (joke)

Notices
LandarVargan

Adds chatcommands server staff can use for announcements

NodeCore Adamant: Revised
Winter94

Adds Adamant, a new metal ore, deep underground/

Kill Button
niwla23

Allows you to kill yourself from the UI

Bubbles
niwla23

Adds bubble machines

This should be make sense!
1F616EMO

Adds missing crafting recipes that should exist

Better Fences (1F616EMO Redo)
1F616EMO

Allow fences to connect to all nodes

Bouncy Mushrooms
AirplaneMan

Adds Bouncy Mushrooms to MT

Build Mangle (Joke only)
RasPiManiac

Type /destroy to mangle a build :P

Fruit Tree Framework
kronosta

Adds a way to easily add fruit trees, and the ability to have saplings for any item through /giveme

Chat Notification
Misnad

Plays a notification sound to all player when a player sents a chat message.

Cute Pie
Don

Cute blocks

Boulder Dig
Neuromancer

Creates gameplay for the game Boulder Dig (inspired by Boulder Dash). Find the boulders and gems scattered throughout the regularly generated world. 2nd option is more densely packed levels.

Priority Queue
Wiz

Associate items with priorities to order them.

Bunny Hop
Flay Krunegan

Allows players to move faster using a key combination

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

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!!

topluck
Neocraft1293

TopLuck is a plugin that allows you to see your player's luck in real time.