Mineclone2 New Ores and Deepslate
NO11

Adds 30 new deepslate blocks!

Mineclone2 Copper
NO11

Adds Copper Ore, blocks and items.

Multiple Biome Generator
chaosomnium

230 Pseudorandomly Generated Biomes, Trees, Fruits, Ores, Tools, and Liquids

Placeable Buckets for Catching Rainwater
Noodlemire

Allows empty buckets to be placed as nodes in order to collect rainwater.

Research N' Duplicate
Noodlemire

Obtain and research enough of a specific item to unlock the ability to infinitely duplicate it.

Ropes
FaceDeer

Adds rope boxes of various lengths and also rope ladders.

More Stones
Blocky Player

Adds some different rocks and stones, and building blocks.

Falls
Just_Visiting

A Particle-based Waterfalls/Lavafalls Mod

Portal gun
AiTechEye

Portals and stuff

Better Ice
TheFanne

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

Plastic Box
Starbeamrainbowlabs

Adds a recolourable plastic box. Fork of @cheapie's version with improvements.

Ocular Networks
PolySaken

Draw power from the world, and use it to power machines and tools.

You Can't Touch It Either
Avicennia_g

Simple mod adding lockable storage shelves to Nodecore.

Poly Decor
PolySaken

My spin on decorative stuff.

Antipyre
Warr1024

Safety net against falling off your island