Placeable Buckets for Catching Rainwater
Noodlemire

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

Frozen Energy
bell07

Use frozen energy crystals to freeze water

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.

Falls
Just_Visiting

A Particle-based Waterfalls/Lavafalls Mod

Thirsty
csirolli

Adds a "thirst" mechanic, similar to hunger.

Astralcraft
EmptyStar

Adds shooting stars and and related items to Luanti worlds

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.

Astral
DragonWrangler

this is a fork of astral

Waterfalls
Termos

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

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.

Cloudcraft
EmptyStar

Adds tangible clouds and cloud-related items to Luanti worlds

Generic moon of Saturn
Red_King_Cyclops

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

Better Ice
TheFanne

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

SnowSong, the EPIC Sound Pack
tacotexmex

SnowSong, the EPIC Sound Pack

Lavaplop
DS

Makes lava plop every now and then

Tree Particles
SuperStarSonic

Adds particles of falling leaves when you punch a tree

Archaeology
SkyBuilder1717

Adds an looting and API in archaeologing

Time Stone
j45

This mod adds 2 single use stones, a day stone and a night stone, the day stone turns time to sunrise and the night stone turns time to sunset.

Unstable Caves
M BLOC

Some stones may cave in if punched, making underground expeditions more risky.

Additional Gravel
Hordeking

Adds overgrown gravel, similar to mossy cobblestone.

Thermometer
csirolli

A thermometer to check the temperature

Rotting Wood
Polynium

Causes wood to slowly rot while exposed to water

Lava + Water > Stone
1F616EMO

Cool Lava into technically special stones for easier cleanup

Mines
ApolloX

Regenerating terrain

Bouncy Leaves
1F616EMO

Adds bouncy and fall damage reduce effect to leaves

golden lava
GigaByte

add golden lava

daymachine
niwla23

Make day by using one mese crystal!

Sun Flowers
Hybrid Dog

This mod generates flowers which close their heads at night.

No Floating Gravity Blocks
nneett

Registers an abm to not leave falling blocks floating

CSperson's Simple Pebbles
CSperson

A very simple mod that adds natural detritus. Doesn't do much besides that.

Renewable Fireflies
mecha_moonboy

Registers an ABM on some ground blocks that spawn fireflies if certain criteria are met.

Kill history hud
GigaByte

adds a death history on the screen

Grow Dry Grass
Silver Sandstone

Makes dry grass spread on savanna dirt.

Portal gun
AiTechEye

Portals and stuff

Mud
Blocky Player

Adds stylish mud blocks and even blocks you can walk through. Setup traps, secret rooms and much more!