Allium Peripherals 
For CC:T for Fabric & Minecraft 1.16.5
Allium offers a couple peripherals - and more planned as ideas are proposed. The two currently provided are the survival and creative chat modem. These modems function identically to the chat module from SquidDev's Plethora peripherals mod. This mod depends on ComputerCraft: Restitched.
Items
The current list of items in the game, along with a bit of documentation on their methods.
Survival Chat Modem
To start, right click on one to bind yourself, right click to unbind. Nobody else can unbind you from a chat modem you've bound yourself to (apart from breaking and replacing it). Once bound you have access to all the methods:
capture: add a pattern to queue an event every time you send a message that matches. Once a message gets captured, it does not get sent to anyone else.uncapture: removes a single given pattern or all patterns if none are suppliedgetCaptures: returns a table of all capturesgetBoundPlayer: returns two strings, the username of the bound player, and the UUID of the bound playersay: sends a message to the bound player.
Creative Chat Modem
The creative chat modem is similar to a survival modem, with the exception that it applies captures globally. Since it
lacks the need for a player, the methods getBoundPlayer and say do not apply to the creative chat modem, all others
from the survival modem are identical.
Rationale & Credits
So basically I was really bored, and tired of waiting for Plethora to update (insert obligatory SquidDev comment "PRs Welcome!"), so I went and made what I needed. I used Fabric because open source ethics, love for the community, and love of framework.
I would like to give a huge(blank) thanks for all the users on the fabric community discord for helping me make this mod a reality, from shouting at me to refresh gradle, to dealing with my ineptitude while trying to implement block entities. I'd also like to thank SquidDev in particular for assisting me when I came across issues with the CC end of the mod.