Coins
Clyde

Adds 3 kind of Coins to your game

Spawn redo
cathaya7d4

Drop-in replacement for default/spawn for more third-party biomes

Openion Yeast
Wovado

Adds Yeast and a Yeast Barrel

New Biomes
Arkatron

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

Super Axe
adrian-castravete

An automatically wood chopping axe.

Anarglass
VerdiSchubert

Some kinds of glass nodes

obsidian
Giga_M

more uses for obsidian

Spectator Mode
jp

Allows you to watch other players in their 3rd person view.

Petards
IlzumiZeminori

Miscellaneous pyro things

Item Holders
Jose_ManuelS18

Adds 'Item Holders', blocks that hold your items in display, also provides a API.

Cannonballs
AwesomeDragon97

Launch explosive cannonballs at your enemies.

Sun Flowers
Hybrid Dog

This mod generates flowers which close their heads at night.

Nextgen Compass
StarNinjas

A compass item which points towards the world origin.

Offline Phantoms
Kimapr

Players leave "phantoms" when leaving; other players can take items from those

Colored Leaves
Otto

Adds several colors of leaves

Frames
opfromthestart

Frames from Technic since it was removed.

Weedstone Random Mod Thing
chaosomnium

Originally meant to be a simple electronics type mod inspired by redstones, I messed around with the code after getting bored and got this weird mod, and now it's this thing. Enjoy I guess?

Ben's Gear
MissingTextureMan101

Attach tool parts to create new tools and add a whole new layer of strategy to your tool crafting!

Grimoire
monk

Override tool functionality during runtime

Shortcut
Derevio

Adds the ability to set shortcuts to commands.

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.

Nyancat's heaven (reworked)
Hybrid Dog

Adds a nyanland in the sky

Hbdrunk
UnchainedDevelopment

Adds intoxication effects and HUD bar to display intoxication level.

Server Essentials
jolethen

An essential mod for any server

Tile Floors
ClassicAdam

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

Colourful Ladders
Itz-Noah

40 colourful wooden ladders

Ubertool Mod
HartRend

Provides a combination pick, shovel, and axe tool capable of extreme function. Tool is also illuminated.

Chat History
sorcerykid

Interactive chat history viewer with a variety of message filtering options

Technic Transporter
Fruitsnack

Mod that adds a technic-powered HV transporter

Cave explorer tool
SFENCE

Cave explorer tool to use acoustic signals for undergound exploring.

Splink Storage
Yoreni

Adds items that can store massive amounts of other items in your inventory

daymachine
niwla23

Make day by using one mese crystal!

Leather Armor
X17

Adds an armor made of leather

My Mulch
Don

Turns leaves and other items to mulch blocks

Area-Locked Chests
1F616EMO

Locked chest that check protections

BitChange
Krock

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

Purple ore
X-DE

Adds new purple ore to floating islands and caves from height 200 to 31000.

Parcdeco
Floatland

adds grass-like nodes that have flowers

Simple Dice
farfadet46

Simple dice for little games ;)

moneybag
Giga_M

add money bag