This is a port of the mod Squake Fabric to 1.20. Thanks to the original creator of Squake for making this possible. If you want to play older versions, get them from the original mod page.
Squake adds bunnyhopping, strafe jumping, air control, trimping, and sharking, while also eliminating speed loss from fall damage (server-side installation required). Bunnyhopping has configurable caps, and is code is inspired by Half-Life and Quake.