There are 2 repositories under minecraft-anticheat topic.
Anti-cheating plugin for Minecraft (1.5-1.20, Bukkit/Spigot)
Scythe AntiCheat - The best minecraft bedrock anticheat designed for realms, worlds and servers
The free anti-cheat since 2016
*NEW* Realm Anti-Cheat | Anti Hack, Horion, Toolbox, FLY | Minecraft Bedrock 1.19+ | Works on realms, servers, worlds and more to protect your servers from anyone using horion, toolbox, or any other hack client.
A powerful anticheat made to destroy hackers from your server for PocketMine-MP.
A List of Minecraft Anticheats
The best minecraft bedrock anti cheat with strongest detection. It's a realm anticheat mainly.
Cardinal Anticheat (CAC) - Spigot Anticheat
The best free anticheat for minecraft bedrock edition
RealTrippy strikes once again!
A backup source for Minecraft PVP-focused client made by LEF-ganga (aka ImFlowow)
The most advanced Minecraft Bedrock anti-cheat solution
A Minecraft Launcher Information Checker
Scythe AntiCheat - The best minecraft bedrock anticheat designed for realms, worlds and servers