A fork of MineClone 2 with no release milestones, rapid delivery, merges by one approval and no MC target version limitations. But technically it's still MineClone 2.
Multiple Biome Generator
230 Pseudorandomly Generated Biomes, Trees, Fruits, Ores, Tools, and Liquids
Survival in hardcore acid-alien sci-fi themed world
This combines several other mods that I consider a basic minimum starting point for worlds.