Music Player
Jose_ManuelS18

Adds a music player and discs

Sounds
AntumDeluge

A set of free sounds & API.

Sedimentology
sofar

A mod that adds realistic erosion and degradation of rocks.

Simple Tape Measure
OgelGames

Adds a simple tape measure.

Filter
sofar

A chat filter for servers, to warn/kick/ban on swearing

Flyspeed
ROllerozxa

Fine grained control over your flight speed.

Epic
BuckarooBanzai

Enhanced Programmer for Ingame Control

DogBlocks
Hybrid Dog

Cute, adorable dog nodes

Server Shops
AntumDeluge

Shops intended to be set up by server administrators.

Gauges
Calinou

Adds health and breath gauges above players.

Item Repair
ApolloX

Repair many items with ease.

MT Expansion
GamingAssociation39

An expansion for MTG

Fast Build Tool
playduin

Tool for fast box building

Reinforced Diamond Tools
ImAlreadyHere

A sword and a pickaxe that are really strong and can be crafted with diamond blocks and sticks.

Smoke Signals
Just_Visiting

Signal your friends, or warn your enemies!

OreControl
elnoonlini

Fully configurable ore generation control system

Climbable Trapdoors
ZenonSeth

Makes the wood and steel trapdoors climbable

Medieval (Fork)
DragonWrangler

an addon to darkage

Power Rangers Modpack
LC Creations

Adds power rangers and an API to create your own.

Build Easy Box
epCode

A handy tool allowing the creation of large structures with minimal effort (in survival!).

Rhotator Screwdriver
entuland

A predictable tool to rotate nodes

Lua Wand
IlzumiZeminori

Tool with programmable on_use

Flow Extras
lazerbeak12345

An experimental collection of extra widget APIs for flow

TP to Death Point
Sadistic Angela

Command to warp you to your death point instantly.

item_magnet
fluxionary

a magnet for picking up items

Staffs
CalebJ

Staffs with various uses

Worldedge
Don

Teleports the player to the other side of the world when they reach the edge.

Mapserver
BuckarooBanzai

mod for the mapserver

HUD Analogic Clock
APercy

Adds an analogic clock to hud

Disable Build Where They Stand
LMD

Disables placing blocks at places where they would collide with a player

Parties
Zughy

Team up with your friends and create a party!

Utilities for Underch - extension pack
Hypernoot

Extend the Underground Challenge by miscelaneous utilities and change some recipes

MC2.0 for MineClone2
1F616EMO

Minec**** 2.0 April Fool's features

Glamorous Deaths
mixer

Announce player demise via server-wide death messages

Zenrake
Hussell

Adds 4 new rake patterns to NodeCore

Candy
Kostivar

Adds candy which you can make from candy ores.

Rain Barrels and Wells
Piezo_

Replaces overpowered "water generators" with a unique water-harvesting system

Balloon Bop
MisterE

Based on ExeVirus's Balloon Bash Ludum Dare submission, comes a minigame for Arena_lib all about Popping huge quantities of balloons and not letting them touch the ground.

pilzmod
Phii

a spreading mushroom biome which you can spawn into the world, with its own monsters and a boss you need to slay to stop the biome's growth. Best played with bow & armor mod and after reading manual.

NodeCore Snakes
Kimapr

Sneaky snakes in NodeCore!