tides & floods
Lemente

Adds the /sealevel command to rise/lower the sealevel.

Simple Xray
MikeRedwood

Makes stone and desert stone see through, also works with nether mod

Ambient Light
MikeRedwood

Makes all nodes lit to a small degree!

Loria (alpha)
siegment

Survival in hardcore acid-alien sci-fi themed world

Falls
Just_Visiting

A Particle-based Waterfalls/Lavafalls Mod

Nyan Cat
rubenwardy

nyan nyan nyan nyan nyan nyan nyan nyan nyan nyan nyan nyan nyan nyan nyan nyan

Better Ice
TheFanne

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

Creative for NodeCore
Warr1024

"Creative mode" for NodeCore: adds a rc_reative priv, /rs chat command, and "replica" nodes.

Cave Explorer
Hume2

An utility for cave exploring in creative