Desolate is a Minecraft mod wich goal is to add biomes that unlike most vanilla overworld biomes are made to feel desolate and devoided of life and even hostile.

Current features in Desolate v1.1.1.

Biomes:

Burnt Forest:

 Burnt Forests are a biome covered with Ashes from wich grows "Burnt Trees", despite their name those "Trees" are actually fungi.

No mobs other than Creepers and Silverfish can spawn in burnt forests.

Cruenum Forest:

Cruenum forests are a warm biome where you'll find Cruenum Trees.

Structures:

Burnt Cabins:

-Burnt Cabins are small structure that generate in Burnt Forest biomes.

Blocks:

"Burnt" Wood set:

Burnt Stems can be used to craft their own set of blocks (stairs, slabs, fences, doors, trapdoors, fence gate, button and pressure plate) and can also be used to craft all the basic wooden items.

Cruenum wood set:
Cruenum logs can be crafted into planks and be used to craft stairs, slabs, fences, ect.

Steel:

Steel is a new ore that can be found very rarely unless you are in a Burnt Forest Biome in which you will find plenty of it.

Raw steel can also be crafted when combining Raw Iron and Coal.

Raw steel can be smelted in a furnace and turned into ingots and turned Blocks of steel, and just like Copper they can be used to craft Cut Steel Blocks which can be used to craft Stairs and Slabs.

Crates and Reinforced Crates: 

Crates are new storage blocks to store your items.

Using 4 planks and 4 iron ingots you can craft yourself a crate, this crate has 45 storage slots.

Reinforced crates can be crafted using a regular crate and surrounding it with 4 obsidian and 4 steel ingots, reinforced crates only have 36 storage slots but can resists explosions.

Ashes and hardened ashes:

Ashes and Hardened Ashes are 2 new block that can be found in burnt forests biomes.

Ashes are affected by gravity while Hardened Ashes are not.

Items:

Cender Berries:

Cender Berries are a new source of food they can be harvested from Cender Berry Bushes that can only be found in Burnt Forest biomes. They give 4 hunger points when consumed.