BlazinJump is a double jumping plugin which allows you to jump twice and be launched into the air. Below is a wiki on how to install the plugin, as well as how to use it.
For support contact us at our discord!
1. Download the plugin's phar from here
2. Drop the plugin's phar into the /plugins folder in your server
3. Restart your server so that the plugin will be enabled!
Go in-game and jump twice and you will be launched into the air!