Hi! There are several popular anti-cheats that are widely used in the gaming industry. Among them we can highlight programs such as VAC (Valve Anti-Cheat), BattleEye, Easy Anti-Cheat (EAC), PunkBuster and FairFight. Each of these programs has its own peculiarities, but their main purpose is to detect and prevent the use of illegal programs and cheats in games. You can also find a lot of good anti-cheats on https://www.sxe-injected.com/.