GC Gamemode
stellarorion

Easily switch between the survival and creative inventory

WorldEdit Wall Block
SkyBuilder1717

Adds block and item for making big structures easily as possible.

Traverse
shaft

Adds cannons, pipes and tractor beams to allow players and entities to traverse the world in new ways.

CreNodes
gtzi203

Adds useful nodes for the creative mode, like barriers or light nodes.

K Color Blocks
ketwaroo

Adds specific stainable blocks for building stuff in creative mode. Comes with a rainbow wand for applying the tints.

Wind Charges
Tomlaus

A mod that adds wind charges as a fun item.

Blood Bane Sword
Blocky Player

OP sword for moderators. In memory of an old teacher, who had a mod similar to this on a private server.

awuuwa's Building Blocks
awuuwa

various building blocks

Poly Decor
mt-mods

My spin on decorative stuff.

resurrection cross
GigaByte

add resurrection cross

Meseconometer
DS

Device to meassure time of mesecon signals in globalsteps

MathPlot
kyleclaassen

A tool for constructing mathematical curves/surfaces/solids.

Math blocks
Giulio

Adds decorative math blocks to help in teaching

3d Random Walk Blocks
chaosomnium

3d Random Walker Blocks that create interesting structures in the world

aw_edificiosdecuba_habana
JALdMIC

It has some buildings based on those in Havana

Chromakey
SkyBuilder1717

Adds an chroma blocks for videos or photoshop.

Drawstruct
Xenon

Draw or generate random structures

Home Assistant Mod
Jeff Schilders

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

aw_viviendayrevolucion
JALdMIC

Add some buildings

Pine generator
Themostrandom01

Allows you to make stylish pins