Collectible Skins
Zughy

Wear and unlock skins

Melterns
IcyDiamond

Create unique tools from different materials!

music modpack
mt-mods

Music modpack with API for easy in-game music playback and custom track registration.

Elepower
IcyDiamond

A wide variety of useful machines

Fire Plus
LandarVargan

Allows players to be lit on fire.

Magma Conduits
FaceDeer

Removes default mapgen lava and adds widely-spaced vertical lava "veins".

In the Fog
Jo5629_

Herobrine has entered your world.

Geodes
AwesomeDragon97

Adds amethyst geodes and an API for making custom geodes.

Zero-Effort Custom Minerals
Piezo_

A tool for registering entire materials, complete with ore generation, tool-sets and automatically generated sprites with almost no effort required

Power Rangers Modpack
LC Creations

Adds power rangers and an API to create your own.

Treasurer
Wuzzy

A framework to define and distribute random treasures into the world.

Placeable Buckets for Catching Rainwater
Noodlemire

Allows empty buckets to be placed as nodes in order to collect rainwater.

City Block II
sorcerykid

Disables use of water and lava buckets within a designated area

Fluid Container API
IcyDiamond

Library for nodes containing fluids

Configuration Panel
sorcerykid

API extension that allows seamless loading of mod configuration at runtime

Dungeon loot chests
X-DE

Adds loot chests, a command to prevent spawning loot in the chest so you can save a schematic with a loot chest, adds 2 functions to create loot in other chests

Beds Redux
sorcerykid

A complete rewrite of the Beds mod with many additional features

Guns4dWorkbench
Jo5629_

Craft guns and their components with an added workbench.

Computing
Lunovox

Add multiple computing devices such as: Smartphones and Desktops. It supports several apps integrated by other mods.

House Windows
DiamondPlane

Adds windows for your house

Jean's Economy
Jean3219

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

Paintings Library
JoeEnderman

A simple paintings library for MTG and potentially others in future.

Basic Ownership
sorcerykid

An efficient and flexible node-based protection scheme for multiplayer worlds

Pillars
citorva

Add a lot of pillars for fun.

Mesecons Stealthnodes
Clyde

Register your own Ghoststones.

Item Holders
Jose_ManuelS18

Adds 'Item Holders', blocks that hold your items in display, also provides a API.

Archaeology
SkyBuilder1717

Adds an looting and API in archaeologing

Loot
Byakuren

A loot framework.

Scripted World Editor
Neuromancer

API that allows you pass in scripting tables to fill a series of shapes of different sizes with different nodes

Trucraft
mt-mods

An alternative crafting system done entirely in the world.

GetName
kevins

Adds an API and tool to generate random names for NPCs, mobs, and places.

Discrete Player API
Hume2

A library for games which attaches players to node grid

Noriel Sylvire's Minerals Core Modpack
Noriel_Sylvire

An API for automatically registering recipes, nodes and ore generation.

Minebase Core
ThatCommand

Adds APIs and new dynamic functionalities.

Phonics Library
Neuromancer

Provides a library for creating Phonics (Learn how to read) mods in different languages.

Debugging Console
sorcerykid

Provides an in-game HUD to easily monitor debug output

Library Mount
Panquesito7

API Framework for mounting objects.

Telegram
neko259

Integration with telegram messenger chat

Walkover
lordfingle

A library to make it easier for developers to detect on_walk_over