Geodes
AwesomeDragon97

Adds amethyst geodes and an API for making custom geodes.

Home Point
ApolloX

A /sethome and /home

Placeable Buckets for Catching Rainwater
Noodlemire

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

Power Rangers Modpack
LC Creations

Adds power rangers and an API to create your own.

Sounds
AntumDeluge

A set of free sounds & API.

SkillsFramework
domtron vox

SkillsFramework provides an API for creating and managing skills.

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

Air Currents (sum)
Sumianvoice

Adds air currents which can push objects and players.

Complete and Total Lua-Only Inventory Rewrite
Noodlemire

Creates a completely custom inventory system, which doesn't rely at all on any of the usual UserData objects.

smartshop (flux's fork)
fluxionary

a smarter and easier shop

City Block II
sorcerykid

Disables use of water and lava buckets within a designated area

Visible Wielditem
LMD

Shows your wielditem

Name Generator
FaceDeer

A lua library for generating random names based off of rulesets and syllable lists.

Climate API
TestificateMods

A powerful engine for weather presets and visual effects. Requires a weather pack like Regional Weather.

Xmaps
erlehmann

Adds map items that show terrain in HUD

Walkover
lordfingle

A library to make it easier for developers to detect on_walk_over

World Data Manager Library
AntumDeluge

A library for managing data files in the world directory.

Oreveins
ApolloX

A node which produces ores

Handle Schematics
Sokomine

A library to make creating and placing saved areas easier.