Engravings
Taren

Adds multiple engraved blocks and benches to make them.

Mortar
suhaib

Adds a mortar cannon

Free Stuff Generator
AiTechEye

junk has never been so coveted!

Rainbow Source
Shara

Adds coloured water.

Node roads
MatyasP

Add much of one-node roads and crossroads, road bridges and slopes

Quartz New
alerikaisattera

Quartz and quartz glass building blocks

Cassettes
X-DE

A mod that adds cassettes and a cassette player.

My Paint Wood
Don

Paint wood

My Display
Don

A way to display items

Startest
Robot10&Scheletor

This mod adds several space stuff to the game.

monster_api_gb
Giga_M

add an api to create bosses

Aqua World
NovaX

Generate an underwater world with deep water, sand, and sandstone.

musketeers & rifles
Raymoo Hakooray

one shot, one down

Explosion proof obsidian
Miner34

Adds an explosion proof obsidian.

Cthulhu eye boss
Giga_M

Cthulhu eye boss adds

Ethereal: All-faces tree blocks
1F616EMO

All-faces tree block for Ethereal trees

Scripted World Editor
Neuromancer

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

Ufos
mt-mods

adds a ufo for flying around in

New Flowers
LLL4001

This brings more flowers to the base game.

Technic use Battery
1F616EMO

Use energy from RE batteries in the inventory

Top players
Giga_M

Adds a kill, deaths, and kd counter to players.

summer
ulla

SUMMER

Color Blocks
mt-mods

Contains colored building blocks.

Ores Expansion
Groin

Adds a new ore ( for now ) called "Rozeemerald".

Fake Fire
Semmett9

Fake fire adds in a block that looks like fire, but dose not have the risk of burning down your creations.

Unstable Caves
M BLOC

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

Tac Nayn
GreenXenith

Adds Nyan Cat's evil twin, Tac Nayn (and a gray-scale rainbow).

S Potions
Stakbox

Adds a simple potion brewing system for MTG. Includes API for adding custom potions.

Handholds
Shara

Adds a climbing pick which creates handholds in stone, desert stone, sandstones and ice nodes.

Alien Tools
chaosomnium

Adds Alien Tool, Shield, biome, etc.

New Biomes
Arkatron

If you like underground biomes, this thing is for you.

crouched
Giga_M

the player crouches

Bamboo
AwesomeDragon97

Adds bamboo which generates in jungles and can be used as a crafting ingredient.

Pink Lava
TenPlus1

Adds pink lava to certain depth of map with new mahogany obsidian block

Anarglass
VerdiSchubert

Some kinds of glass nodes

Throwable Snowball
ComputeGraphics

Adds a throwable Snowball

Better Fences (1F616EMO Redo)
1F616EMO

Allow fences to connect to all nodes

Hoverboard
mazes

Hoverboards

sfinv++
swagtoy

Improves the inventory, and fixes some formspecs throughout some mods.

My Default Lights
Don

Simple lights made from default material