Cannons
addi

Adds Cannons. Insert muni and gunpowder, and punch it with a torch. The muni can destroy nodes and hurts players.

Minetest Systemd (API)
Piezo_

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

Indestructible Bedrock Layer
Wuzzy

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

Internet Relay Chat
kaeza

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

World Borders
argyle

Add impenetrable barriers to the sides and bottom of the world.

Minetest 2D
AiTechEye

Transforms the minetest world into 2d dimension

Simple Skins
TenPlus1

Mod that allows players to set their individual skins.

Universal geometry realm
paramat

Create worlds of varying shapes

Stained Glass
andersje

Adds various stained glass blocks, originally by doyousketch2

SkinsDB
bell07

Custom player skins manager with support for 1.0 and 1.8er skins and inventory skins selector

Mydoors
Don

Adds several different style doors.

Waffles
GreenDimond

Adds stuff to make waffles (and the waffles themselves of course).

Minecart
joe7575

A minecart running through unloaded areas

Locks
Sokomine

Shared chests, doors, furnaces and signs - with keys

Signs Lib
VanessaE

Adds signs with readable text.

Intllib
kaeza

Internationalization library.

MicuPack
micu

Various devices and machines for experienced miners and TechPack engineers.

Wooden Bucket
Hume2

A bucket made of wood for new farmers

Auth Redux
sorcerykid

Auth Redux is a drop-in replacement for the builtin authentication handler of Minetest

Hidden Doors
Hamlet

Adds various wood, stone, etc.

Lucky Block
TenPlus1

Adds lucky blocks into the game which may give good, bad, hurtful items when open :)

Traders
Sokomine

Configurable mobs/NPC which can trade for you.

Biome Lib
VanessaE

The biome spawning and management library.

Warp Potions
Shara

Cost per use potions teleport system designed for survival servers.

Hallelujah Mountains (AKA Cloudlands)
DrFrankenstone

Giant rocks floating suspended in magnetic eddies. (skylands, islands, fantasy, giant trees)

Wield3D
stu

See the items other players are holding

LED Marquee
VanessaE

Provides a simple LED marquee that accepts single characters, strings, or whole screen-fulls of text, via Digilines.

Digiterms
Pyrollo

8bits style monitor and keyboards using digilines

Bonemeal
TenPlus1

Adds bone and bonemeal giving the ability to quickly grow plants and saplings.

Orienteering
Wuzzy

A collection of tools to help you orient yourselves in the world, such as compass, altimeter, etc.

Other Worlds
Shara

Adds asteroid layers and height-based skybox switches to create space environments.

BitChange
Krock

Money items for your world, based on Bitcoins

Drinks
Nathan.S

Adds a juice press and two juice storage containers.

Luscious
sofar

Bring color into the mgv7 mapgen world.

Hyperloop
joe7575

Allows building of tubes to let players travel from point point in seconds (900 km/h)

Swamps
Hybrid Dog

Adds swamps

Markers
Sokomine

Easy interface (GUI) for the areas/advanced_areas protection mod

Working villages
theFox

A mod adding villager NPCs that are doing predefined work.

Tomb Stones
Nathan.S

Adds many shapes and styles of tombstones.

Coloredwood
VanessaE

Provides hundreds of colors of wood and fences to Minetest, using Unified Dyes. Colored, cut wood shapes as well, with Moreblocks.