Custom Chat Prefixes
Impulse

Adds Custom Chat Prefixes, you can choose a prefix and colour.

J_Mute
j45

Mute players that are spamming.

Saturation Adjustment
ROllerozxa

Adds a chat command that allows you to adjust the saturation of the graphics.

Gray Death
srifqi

Make the world look grayscale when you die

No Lag
AFCM

[April fool's joke] Removes Lag

Tell
octacian

Message offline players

Unter Null
Casimir

You start swimming in the middle of an infinite ocean. Take your time and build.

Mudsling
Avicennia_g

Inverted-direction player slingshot

Fake unknown node
orwell

Adds a node that looks like an unknown node

Text Text.
olive

Replace textures of nodes with their names.

Whiter List
AntumDeluge

Restrict server access to only whitelisted players

Simple Dialogs
Kilarin

Simple Dialogs allows you to add dialogs for npcs and other entities, controlled by an in game text file.

Account Manager
rubenwardy

Automatically create accounts in bulk, and export to .CSV and .HTML (and .PDF)

Cycle Limit
LMD

Limits hotbar slot switching

Holoemitter
BuckarooBanzai

Holo emitter mod

Tardis
iarbat

Adds a functioning space-time machine from the tv show doctor who.

Cloud Items
Panquesito7

Powerful cloud tools.

Warning: Non-free media.

Spawners
SaKeL

Adds spawners for mobs, dungeons, temples and ores.

Loot Crates
ElCeejo

Adds randomly spawning loot crates.

Disco trains
sivarajansam

Adds colorful subway trains to advanced trains

Formspec AST
Luke

A library to help other mods interpret formspecs.

Biome Lib
mt-mods

The biome spawning and management library.

Unicode Text
erle

This library can be used to render UTF-8 encoded Unicode text to a texture (e.g. with tga_encoder). It is intended to be used from code that needs to render in-game signs.

Player Monoids
Byakuren

player_monoids is a library for managing global player state, such as physicsoverrides or player visual size.

Travelnet
mt-mods

Network of teleporter-boxes that allows easy travelling to other boxes on the same network.

More TNT
mittelmaessigercoder2

Adds more TNT

Magic Materials
mt-mods

A mod providing common resources and shared magic system for modpacks like gadgets_modpack, bweapons_modpack, and possibly others

Scientifically Accurate TNT
AwesomeDragon97

Fixes some of the shortcomings of the original TNT mod.

Wilhelmines Marinara Mobs
Liil

adds mobs to the marinara oceans

Mobs Skeletons
TenPlus1

Adds three skeletons to the world.

FakeLib
OgelGames

Fake userdata library

VoxeLibre Custom World Skins
covertiii

Add Custom Skins in VoxeLibre

Copper Stuff for Voxelibre
SmokeyDope

This adds copper tools, armor, and decorations to voxelibre.

Mobs Ethereal Bosses
PixelZone

Adds Bosses in biomes from the "Ethereal NG" and "Mineclonia" mods

Tieless Tracks
Sylvester Kruin

Tracks without crossties for Advanced Trains (advtrains) that can be used on streets and other related things

Ruined structures
X-DE

Adds ruins to desert, sandstone desert, icesheet, snowy grassland, taiga, rainforest and tundra

Geodes Library
alerikaisattera

API/library for creating geodes

moreblocks and stairsplus
fluxionary

adds various blocks to the game

Mineclonia Wieldlight
cora

Simple wielded lights for mineclonia with support for mcl_offhand

Wilhelmines Living Floatlands
Liil

Adds various prehistoric animals to your Floatland Zone, if you are using V7 Map Generator.