Slackow

Extracts server resource packs when they are sent to the client and are downloaded into a folder within the game directory (usually .minecraft).

Turns on togglesprint when you join a world/server or die, so you don't have to press or remember to press a key to turn it on.

Removes the comically long "Debug Charts" line in the f3 menu

Adds various snowballs that cause damage and destruction on impact.