Remix is a popular and most recently updated client for Minecraft that will give you a huge number of cheating functions in the game. This client really allows you to go beyond the standard game and you can play much better and more productively.
A rather unique and rare hacked client for Minecraft ReKt will give you many cheats in one client. To date, this client is perhaps the best of all available.
The recently updated Akrien hacked client is now available for new versions of Minecraft. There are an incredible number of functions, each of them has been updated to the latest version and is able to surprise you with its capabilities.