The Protocol is already an old cheat client for Minecraft that makes sense to use even in 2021, because it is fully functional and can easily hack the server. For those who are looking for a truly working and time-tested classic hacked client, the Protocol will be an excellent solution.
JigSaw is a popular hacked client for Minecraft 1.16.5 / 1.16.4 / 1.15.2 with over 700,000 downloads. This cheat is really incredible and has a lot of functionality. Players are given the opportunity to use top cheats in just a few clicks, which is quite simple.
Zane is a pretty good cheat client for Minecraft which you should definitely try on the server. Use the best features for free. This client is private, but it was hacked by kind people and now you can use it without paying.
Inertia is an extremely popular hacked client for Minecraft 1.16.4 and 1.15.2. This hack can easily be used to hack a server and become an admin. Forget about outdated cheats that are not relevant for a long time, because for a real hack you need top functions.
The Fan client, which is quite popular in narrow circles of cheaters, allows you to use premium functions for free in Minecraft. This hack is easy to use even on cool servers like Mineplex or HyPixel.