Alchemy
TheAlchemist0033

adds throwable and regular potions to game (beta)

Upgrade Packs
Krock

Provides craftable packs to players to increase their health and breath

Ocular Networks
PolySaken

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

Knockback
Lone_Wolf

Adds knockback for pre-5.1 Minetest clients without using entities