Beautiful Flowers
1faco

Adds many flowers to MT

music modpack
mt-mods

Music modpack with API for easy in-game music playback and custom track registration.

Cave Explorer
Hypernoot

An utility for cave exploring in creative

Simple Xray
MikeRedwood

Makes stone and desert stone see through, also works with nether mod

Snowdrift
paramat

Light-weight weather mod with snow, rain, and clouds.

Cactus Damage
VMan_2002

Players take damage from touching cactus

NextGen Bedrock
StarNinjas

Adds an indestructible bedrock layer at the bottom of the world.

Magma Conduits
FaceDeer

Removes default mapgen lava and adds widely-spaced vertical lava "veins".

Minetest 2D
AiTechEye

Transforms the minetest world into 2d dimension

3d ores!
Soundwavez

a slick new take on the default ores!

Oxidizing Copper
StarNinjas

This mod aims to make copper/bronze more realistic by making them slowly oxidize into a bluish/green block when exposed to water.

Sedimentology
sofar

A mod that adds realistic erosion and degradation of rocks.

Luscious
sofar

Bring color into the mgv7 mapgen world.

Living Grass
karlexceed

Adds a simple lifecycle to grass

Worldedge
Don

Teleports the player to the other side of the world when they reach the edge.

Placeable Buckets for Catching Rainwater
Noodlemire

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

Lava Ore Gen
Coder12

Makes the lava turn stone into ore over time.

Sailing
cakenggt

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

Random Cool
pl608

Adds random ores on lava cool

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.

Falls
Just_Visiting

A Particle-based Waterfalls/Lavafalls Mod

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.

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

Tree Particles
SuperStarSonic

Adds particles of falling leaves when you punch a tree

Archaeology
SkyBuilder1717

Adds an looting and API in archaeologing

Additional Gravel
Hordeking

Adds overgrown gravel, similar to mossy cobblestone.

Renewable Fireflies
mecha_moonboy

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

Bouncy Leaves
1F616EMO

Adds bouncy and fall damage reduce effect to leaves

Unstable Caves
M BLOC

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

Grow Dry Grass
Silver Sandstone

Makes dry grass spread on savanna dirt.

Lava + Water > Stone
1F616EMO

Cool Lava into technically special stones for easier cleanup

golden lava
GigaByte

add golden lava

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.

After Earth
AiTechEye

The earth's ecosystem has collapsed, and there are no biologically environment left.

CSperson's Simple Pebbles
CSperson

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

Rotting Wood
Polynium

Causes wood to slowly rot while exposed to water

daymachine
niwla23

Make day by using one mese crystal!