Too Many Stones
JoeEnderman

35 new stone types that all spawn in the world on all mapgens but v6.

Loria (alpha)
siegment

Survival in hardcore acid-alien sci-fi themed world

Asbestos
Tim7

A useful fire retardant.

voxelmanip experiments and remade math mandelbox mapgen
chaosomnium

Voxelmanip mapgen with strange layered zone experimental mapgens.