VoxelForge - Breaking Changes soon.
VoxelForge

Build, Fight, Mine, and so much more. A MineCraft Inspired game, focused on being fun, adding good features that Mojang decided against using, and being performant

Loria (alpha)
siegment

Survival in hardcore acid-alien sci-fi themed world

KSurvive
MadKamel

A game that changes much of MTG's gameplay.

Ocular Networks
mt-mods

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