skript-packet
A Skript packet addon to replace ThatPacketAddon (which is not updated) with Skript 2.5.2+

Requirements

• Recent version of Skript
• Stable ProtocolLib dev build (does not works with v-4.5.1)
• Java8+
• It's highly recommended to use skript-reflect

What is a packet
The Minecraft server and your Minecraft client share information called "packets". Example of a packet:

• Any movement made by an entity
• Opening a gui to a player
• When the player use an item

The interest of manipulation of packets is to send fake information to a specific group of players, like display a fake diamond block (client side) instead of a tnt (server side). You can do a lot of things with packets, but it's really hard to understand how to use them ...

This link can help you to identify the content of a packet: https://wiki.vg/Protocol

What is the difference from ThatPacketAddon

TPA is not up to date and is not recommended after MC 1.15.
Skript-Packet provide support from MC 1.12 to the most recent version
Skript-Packet try to improve performances and fix bugs from TPA (exemple : TPA does not fully support play_server_map_chunk)
My Addon add a lot of feature to deal with NMS (like converting Bukkit to NMS and vice versa)
I do my best to facilitate understanding of packets.