Iberia: Minecraft Made Harder
The philosophy of Iberia is to make Minecraft harder in ways that respect the vanilla Minecraft experience, enhance gameplay, encourage more experiences that are available in the game, and add a dose of reality.
Youtuber JSQ made a great showcase of Iberia 2:
Here's my trailer for Iberia 1:
Documentation: http://rockhymas.github.io/iberia/
Repository: http://github.com/rockhymas/iberia/