MisterFish

TwinSession allows multiple connections from the same Minecraft account to a single server or world. Seamlessly manage multiple in-game tasks with different clients, all using one account, without disconnections or additional purchases.

Enable AFK mode without keeping your computer on. Use /offline to spawn a copy of your player. If your offline player dies, you'll die but still have time to retrieve your stuff. If the offline player survives, you'll inherit its gains upon return.

InvalidPlayerBypassList allows specific players - added to a configurable bypass list - to join a server even when online-mode is set to true, without passing Mojang authentication.