NodeCore Crystals
Winter94

Adds various crystal types to Nodecore

Phonograph
1F616EMO

Play music from albums

CoreAnim
SpacingBat3

Interpolated animation modpack, using Luanti 5.9+ API with backwards compatible syntax.

Advanced Trains
orwell

Adds good-looking, realistic trains with realistic rails.

panel_lib
Zughy

Library to easily create complex HUDs

CSMT Bots (Obsolete)
Logikí

Add bots to your game for training

CS:MT (BlockAssault)
Logikí

A first person shooter game with multiple features

Advtrains Info Displays
Nazalassa

A library that uses font_api to render text outside Advtrains trains. Supports several displays per wagon.

Flow
Luke

A formspec library that automatically positions and sizes elements

SzUtilPack
Warr1024

A collection of misc dependency-free utilities primarily for server hosts

More vector helpers
Hybrid Dog

Adds more vector functions.

Lush
rstcxk

fully featured shell interpreter

weapons_lib
Zughy

API to easily create weapons of any kind

audio_lib
Zughy

Library to easily manage sounds (accessibility options!)

AirUtils
APercy

A lib for airplanes and some useful tools

DeltaTime
SkyBuilder1717

Adds deltatime API

Archaeology
SkyBuilder1717

Adds an looting and API in archaeologing

Xcompat
mt-mods

a library that aims to facilitate other mods to be game agnostic by handling sounds and crafting

Minetest test framework
BuckarooBanzai

Provides an api to register test functions for integration-tests.