I have been playing on cheatbreaker for like a year now and cheatbreaker is one of the best clients i have ever used
OpenInv - Open anyone's inventory as a chest in real time! Works with offline players!
Lunar Client - An all in one Client side anti cheat built by the same people who made CheatBreaker.
LabyMod - LabyMod - An all in one Minecraft PvP Modification to increase your ingame experience
Badlion Client - Custom minecraft 1.7.10, 1.8.9 and 1.12.
MultiMC - Overview: MultiMC is a free, open source launcher for Minecraft, managed by Forkk13and peterixxx...
Sakki's Client Essentials (SCE) - Sakki's Client Essentials are plugins for Minecraft Servers and Client's.