Purple ore
X-DE

Adds new purple ore to floating islands and caves from height 200 to 31000.

Beautiful Boulders
regulus

Procedurally Generated Rocks with (pretty) Accurate Collision Boxes

golden lava
GigaByte

add golden lava

Sun Flowers
Hybrid Dog

This mod generates flowers which close their heads at night.

Trucraft
mt-mods

An alternative crafting system done entirely in the world.

Unstable Caves
M BLOC

Some stones may cave in if punched, making underground expeditions more risky.

treasures
ademant

Treasure nodes with useful items

Obdy
Sires

Adds some pretty OP tools :)

Sticks Stones
MikeRedwood

Makes Sticks from leaves and scatters small stones

Underground Survival Lighting
Arkatron

If you like underground light in survival, use this mod, it can help that.

Spawn redo
cathaya7d4

Drop-in replacement for default/spawn for more third-party biomes

Mud
Blocky Player

Adds stylish mud blocks and even blocks you can walk through. Setup traps, secret rooms and much more!

Silver
Jackknife

adds silver ore and tools