A game built 100% from scratch, including code, textures and sounds.
NodeCore Nature: Revised
Updated, fixed, enhanced edition of Winter94's NodeCore Nature
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.
Grassy Goldenrod plant for Nodecore
Survival in hardcore acid-alien sci-fi themed world
Algae mapgen addition to "Minetest Game"
This combines several other mods that I consider a basic minimum starting point for worlds.
A game that aims to contain lots of environments and things.
Gaël de Sailly
A map generator with valleys, rivers, mountains and many plants.
Adds various kinds of plants, fruit bushes, fallen trees, and a whole host of foliage and other ground cover.
Adds a whole bunch of new types of trees, some bearing fruit or similar, using biome_lib for the placement engine.
A mod for Minetest to add underground realms.
Ethereal mod uses the v7 mapgen to add many new biomes to the world.