Pedology
Wuzzy

Adds some different ground blocks in several wetness levels; the wetness slowly flows downward.

Sailing
cakenggt

Live in a tropical paradise where you can sail, mine coconuts, etc.

WhyNot?
bell07

Aims to get all existing high quality mods working together

Random Cool
pl608

Adds random ores on lava cool

Frozen Energy
bell07

Use frozen energy crystals to freeze water

Tides
markthesmeagol

Adds tides, WARNING: will delete water sources above sea level

Clump Fall Nodes
Noodlemire

Makes most nodes able to fall without enough support.

tides & floods
Lemente

[WIP] [Warning: read full description] Adds the /sealevel command to rise/lower the sealevel.

Bucket lite
daret

Bucket - fork of Minetest Game mod with reduced "bucket" liquid flowing

Giant Mushroom/ Mushrooms
Hybrid Dog

Add mushrooms and giant mushrooms.

Climate API
TestificateMods

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

Dynamic Liquid
FaceDeer

Flowing dynamic liquids and ocean-maintenance springs.

Lightning
sofar

A mod that adds thunder and lightning effects.

Mineclone Better End
TX_Miner

Make the end better in Mineclonia and Mineclone!

Thirsty
csirolli

Adds a "thirst" mechanic, similar to hunger.

Funny Shadows
x2048

Adds sunlight shadows to your world

Astralcraft
EmptyStar

Adds shooting stars and and related items to Luanti worlds

Regional Weather
TestificateMods

A weather pack for Climate API

Moon Phases
TestificateMods

Changes the moon to follow a cycle between eight different phases.

Footprints
FaceDeer

Players walking over various types of terrain will leave footprints, and optionally pack the soil down into trails

Radiant Damage
FaceDeer

A mod that allows nodes to damage players at a distance

Horror: Rescared
SkyBuilder1717

Fork of TX_Miner's Horror mod, but heavy modified with adding a lot of additional stuff.

Falls
Just_Visiting

A Particle-based Waterfalls/Lavafalls Mod

More particles
Qual

Makes game more immersive by adding more particles

Mymonths
Don

Adds days of the week and months. Also weather, including rain and snow.

Waterfalls
Termos

Adds water erosion, so flowing water forms somewhat more realistic looking waterfalls.

Ecliptic Cycle (Moon Phases)
Extex

Adds lunar events and moon phases by shifting the moon in and out of a lunar eclipse.

Cozy Lights
SingleDigitIq

Early alpha. Improves the way light sources(torches etc) behave and allows to create huge lights, literal projectors with just a mouse click, light map will be computed for you.

Calendar Node
Wuzzy

Adds a placeable calendar

Solar Phases
VeproGames

Simulate variable daytime lengths, including polar day / night

Elephant Veins
jan Epiphany

Replaces small, sporadic ore pockets with sparse, gigantic ore veins.

NodeCore Naturae: Revised and Revamped
Winter94

The Latest and Greatest Version of NodeCore Nature, with updated code from Warr1024!

Astral
DragonWrangler

this is a fork of astral

NodeCore Fungi
Winter94

Adds various fungi to NodeCore, in all their mycelial glory.

NodeCore Skyblock
Kimapr

Play NodeCore on floating islands!

Better Ice
TheFanne

Modifies ice so that it melts into water when broken, and will be melted by torches

Cloudcraft
EmptyStar

Adds tangible clouds and cloud-related items to Luanti worlds

Leafstride
EmptyStar

Allows players to climb and walk through leaves

K Ambient Light
ketwaroo

Pseudo ambient lighting to banish the deep dark night. Allows a few extra granular tweaks and override options.

Generic moon of Saturn
Red_King_Cyclops

Replaces the default earthlike setting with a generic moon of Saturn.