Blumbo

Different armor and damage mechanics that make make survival more suitable for PvP.

Reduces randomness in bow and crossbow damage.

Makes Crystal PvP less ping dependant by making End Crystals more client-sided.

Gives you control over which types of items to keep and which to drop when a player dies.

Allows you to change explosion power, fire spread and disable dropped item destruction for different explosion types.

A bunch of features that make fire more tolerable in Minecraft.

Makes it easier to get the most out of splash potions.