action queues
fluxionary

provides an API for queuing things for batch processing w/ various ways to specify the batch "size".

Stent
AFCM

A formspec based arena entrance type for arena_lib

description_monoids
fluxionary

API to allow multiple mods to make modifications to an itemstack's description

Dialogs
1F616EMO

Dialogs with options

Select Item
Wuzzy

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

Advance ore API
Sere Motsatt

Create complex minerals the easy way

Compression Lib
The4spaceconstants

A library that provides functions to procedurally register compressed versions of nodes.

Sway
lazerbeak12345

A simple inventory that makes use of Flow forms.

flinv
Luke

API to add new inventory tabs which work across different inventory mods

craftsystem
fluxionary

craft registration API which automatically deals w/ replacements

Noriel Sylvire's Minerals Core Modpack
Noriel_Sylvire

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

Smart Chat
Clyde

A new, lightweight, simple and modular Chatsystem

aSignals
Sumi

Signal event bus API including SIGNAL, LISTEN and CONDITIONAL functions

Random API
TheFanne

Provides a simple-to-use framework for selecting random objects with probabilities

Lush
rstcxk

fully featured shell interpreter

VizLib
OgelGames

Visulization Library

rcsv
Wuzzy

RFC-4180-compliant CSV parser and writer

item_monoids
fluxionary

an API for controlling item properties via monoids

Babelfish Redo
1F616EMO

Translate chat messages into other languages

IntelligenceFramework
PlamiumAI

Provide an AI RNN API for developers.

Chat Games API
Impulse

An API to build chatgames like those in the chatgames

deploader
LuantistDork

Simple mod API that automates dependency-specific behaviour using a folder-heavy approach.

Pluggable Helpers
sorcerykid

Automated dependency management of helper functions within a distributed architecture

Luarocks Wrapper
lazerbeak12345

Securely Wrap Luarocks packages without needing trusted mods.

Telegram
neko259

Integration with telegram messenger chat

Database Manager
AFCM

Database Manager API

Prop Hunt Modpack
Jo5629_

Transform into nodes and with a minigame.

Squill
Luke

A subset of SQL. No complex installation required.

Matrix Chat
joenas

This mod creates a bridge between a Matrix channel and the in-game chat!

Persistent Effects
epCode

An API for creating persistent effects for any object. eg. damage a player or entity over time. (like poison)

BigNum
ThePython10110

A library that adds a data type for arbitrary precision integers

YALib
hutzdog

Yet Another Library

Virt
frogTheSecond

A library for (qemu) virtual machines

node entity queue
fluxionary

a queue for spreading out the generation of node entities over multiple server steps (smartshops, signs, itemframes, etc).

SmartFS
rubenwardy

A library to allow mods to make Formspecs, a form of GUI, easily.

Position listeners library
karamel

Players' position observing library

Operating System Detector
TPH

Checks the OS of the device running the mod.

Table Goodies
benrob0329

A small package for extra (can't live without) functions for working with tables.

Anti Exploit
LMD

Protects against exploits

DeltaTime
SkyBuilder1717

Adds deltatime API