XNether
Ghaydn

Adds trees, grass and ores to PilzAdam's Nether

Medieval (Fork)
DragonWrangler

an addon to darkage

Cones: Traffic and Training Cones
ClassicAdam

Cones. Various use traffic cones and training cones. 3 sizes, 10 colors, 30 cones in total.

Irrigation
monk

Makes dry soil wet for farming

Beautiful Boulders
regulus

Procedurally Generated Rocks with (pretty) Accurate Collision Boxes

Colored Sand
LoneSurvivr

Adds dyed variants for the default sand.

Hardcore mode
SkyBuilder1717

Adds a hardcore mode.

Elepower Recycle
DumbDave961

Recycling recipes for Elepower items.

Technic Recycle
DumbDave961

Recycling recipes for Technic items.

Home Assistant Mod
Jeff Schilders

An experimental mod to turn real lights and switches on and off in your smarthome within a minetest world.

Portable Chests
Bob64

Portable chests you can pick up even when there are items inside.

blackhole containment box
Soundwavez

cool swirvy gravitational blackhole boxes, that can be used to "ahnialate" enemy bases, or for "deforestation" aah i love abms! (extra dramatic!))

Art Paintings in Frames (high res, 512px)
ClassicAdam

Various paintings in frames for hanging on walls. High res at 512px.

Technic use Battery
1F616EMO

Use energy from RE batteries in the inventory

Dirt Tunneler
Neuromancer

Makes dirt deeper and you can tunnel through it just by walking through it. Press spacebar/shift to tunnel upward/downward with auto placed ladders.

SkinChooser
mike.monkeybiter

Open skinsdb by right clicking a node

Tinted Glass
1F616EMO

Colored glass

SuperQuest
Andrii

Allows to create quests with rewards which can be passed by triggering flags placed in different places

Better Roads
DragonWrangler

allows players to make roads with less jagged edges

Fruit Trees
korin_rider

Fruit trees of diferent types

Technic Armor
mt-mods

Adds armor made from lead, brass, cast iron, carbon steel, stainless steel, tin and silver

More Structures
ClothierEdward

Adds several new structures to make your world more alive.

Tile Floors
ClassicAdam

Various colors of tile flooring in 16px and 256px res

Banisters
1F616EMO

Adds straight and diagonal banisters for stairs railings.

Safe TNT
1F616EMO

Apply height restrictions to TNTs

Dyes for Extra Biomes
Skivling

Deprecated because after ebiomes v1.5.0, dye recipes are included by default, making this unnecessary. Adds dye recipes for the flowers from Extra Biomes.

Fareboxes and Faregates
1F616EMO

Signal-emitting fareboxes and faregates

Ufos
mt-mods

adds a ufo for flying around in

Scripted World Editor
Neuromancer

API that allows you pass in scripting tables to fill a series of shapes of different sizes with different nodes

Grimoire
monk

Override callbacks from new or edited Lua files during runtime

Gems Battle
MisterE

Bedwars-like team battle minigame

Steel bar blocks
sotha1

adds blocks made of steel bars (xpanes)

Rock Piles
Neuromancer

Adds rock piles which generate randomly on the surface and in caves

Cottage and Medieval Decorations
1F616EMO

Decorations that fit to medieval settlements and small cottages

Petroglyphs
Neuromancer

Adds petroglyphs which generate randomly in desert stone walls

Shortcut
Derevio

Adds the ability to set shortcuts to commands.

Candy
Kostivar

Adds candy which you can make from candy ores.

Saphire
Ryft77

Adds saphire stuff

Nyfty Blocks
Ryft77

Adds some nifty blocks

Manny
ElCeejo

Adds Manny from that one Reddit post.