pathv7 redo! (Mapgen V7 only)
1F616EMO

Creates a worldwide network of paths, bridges and tunnels.

Wisps
ElCeejo

Adds non-entity mobs called Wisps

Multiple Biome Generator
chaosomnium

230 Pseudorandomly Generated Biomes, Trees, Fruits, Ores, Tools, and Liquids

Smoke Signals
Just_Visiting

Signal your friends, or warn your enemies!

Ocular Networks
PolySaken

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

Emerald Bank and Shops (MineClone)
Nathaniel Freeman

Keep your Emeralds in a Bank and trade with shops