Ufos
mt-mods

adds a ufo for flying around in

Ham Radio
techniX

Radio transmitters, beacons, and receivers

Nodes for rails
MatyasP

Some nodes for building railways, primary for Advtrains railways.

Locked Travelnet
Sokomine

Protect travelnet stations with locks and/or passwords

Generic moon of Saturn
Red_King_Cyclops

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

Ancient Ice Stuff
Robot10&Scheletor

Adds a new powerful ore to the game

Dragonbone Stuff
Robot10&Scheletor

Adds dragonbone set

My Flooring
Don

A basic set of flooring

My Mine Shaft
Don

Makes tunnels straight down that you can climb

Bamboo
AwesomeDragon97

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

Ethereal: All-faces tree blocks
1F616EMO

All-faces tree block for Ethereal trees

Tables
AwesomeDragon97

A simple mod that adds decorative wooden tables.

Stained Glass
andersje

Adds various stained glass blocks, originally by doyousketch2

Fruit Trees
korin_rider

Fruit trees of diferent types

Ancient Bones
karlexceed

Adds bones with loot to dungeons.

My Wood Slopes
Don

Make slopes with wood blocks.

Maple tree
Duvalon

Adds a maple tree placed during world generation.

Better Ice
TheFanne

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

Aqua Farming
Clyde

Farming under Water, now it's possible.

summer
ulla

SUMMER

Abriflame
mt-mods

Adds coloured fire through use of fire starter tool.

My Sponge
Don

A sponge that soaks up water

My Press
Don

A press to flatten steel

Hero TNT
Neuromancer

TNT that only destroys cobble like in H.E.R.O. game. Also flying boulders support for Boulders mod!

sfinv++
swagtoy

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

My Default Lights
Don

Simple lights made from default material

Dyed Water
erov

Dyed water for mtg

Quartz Geodes
AwesomeDragon97

Extends the Geodes mod with quartz geodes.

Potions And Magic
mathys

Add potions and their hud

My Siding
Don

Adds lines on one side of block to make it look like siding

MTC Burger
Can202

Adds Burgers.

Strange Weapons
Robot10&Scheletor

Adds many strange and improbable weapons

Rainbow Source
Shara

Adds coloured water.

Climbing Pick
lag01

Tool to climb, double jump, and do good damage to mobs.

More Crafting Recipes
RasPiManiac

Adds more default crafting recipes

Pillars
citorva

Add a lot of pillars for fun.

Coconut Trees
Neuromancer

Adds coconut trees with edible coconuts & thatch blocks

Mesebox
johalun

Mobile storage box powered by Mese

ObsidianStuff
SoloSniper

Adds obsidian tools and armour

New Horizons
Hi_World

Adds 4 new biomes and TONS of new blocks!