Tree Particles
SuperStarSonic

Adds particles of falling leaves when you punch a tree

Admin Toys
wilkgr76

Tools for admins to have fun with cheating and otherwise rule-breaking players

Top players
Giga_M

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

Maple tree
Duvalon

Adds a maple tree placed during world generation.

Skates
Vasiliy

A simple ice skating.

Avanti Savoia!
JetpackJackson

Adds WW1 stuff, I guess?

Potions And Magic
mathys

Add potions and their hud

Jukebox
LNJ

A mod that adds a jukebox with nine different discs.

Atium
GenesisMT

A strange a ore with tools.

Slot Machine Mini-games
mt-mods

Provides an "engine" to drive simple slot machines (includes two). Spins reels, takes in/pays out in Minegeld (Dan's currency mod), etc.

New Horizons
Hi_World

Adds 4 new biomes and TONS of new blocks!

Technic Recycle
DumbDave961

Recycling recipes for Technic items.

Shield Tome
DarkXWolf17

Magic Shield Tome.

Basket Cooking
1F616EMO

Cook all stuffs inside a basket with electric furnaces

Technic use Battery
1F616EMO

Use energy from RE batteries in the inventory

Climbing Pick
lag01

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

Claymore
Giga_M

adds a powerful sword capable of deforming the ground

Technic Grass Clean
1F616EMO

A tool like chainsaw, but cut grass, not tree.

WorldEdit Wall Block
SkyBuilder1717

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

LW Wires
mt-mods

Wires and bundle cables.

Technic Recipes
alerikaisattera

Extra recipes for processing various items with Technic machines

Lootboxes
Jose_ManuelS18

Adds lootboxes to dungeon loot.

Cube Nodes
Andrey01

Adds colorful blocks with various symbols as letters, digits, punctuation, emoji and special signs.

My Torches HD
Don

Changes default torches to ones that burn out and cause damage

Parcdeco
Floatland

adds grass-like nodes that have flowers

BitChange
Krock

Money items for your world. You can mine bitcoins. Sort of.

Loot
Byakuren

A loot framework.

Anarglass
VerdiSchubert

Some kinds of glass nodes

Useful Contraptions
theFox

Some useful contraptions / machines.

Better Roads
DragonWrangler

allows players to make roads with less jagged edges

Ethereal: All-faces tree blocks
1F616EMO

All-faces tree block for Ethereal trees

Potions
X-DE

Adds a simple potion brewing system. Includes API for adding custom potions. Fork of s_potions_modpack by Stakbox

sfinv++
swagtoy

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

Bloodmagic2
mt-mods

The successor to bloodmagic.

Aquamarine
RasPiManiac

Adds Aquamarine ore, ingots, etc.

3D Spikes
BryanGruik15

Adds spikes to the game.

Saphire
Ryft77

Adds saphire stuff

Pineapple
Neuromancer

Pineapple crop for tropical biomes

Tac Nayn
GreenXenith

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

Safe TNT
1F616EMO

Apply height restrictions to TNTs