What is the best Minecraft free hacked client?

I've been looking for the best free client for quite some time now but can't find a result so I wanted to ask what the best is.

The Minecraft client is free. You only need one account so you can use it without detours. Of course, you can also download the SRC from the client and then use it, but then you can only play on so-called "cracket" servers. To be able to play on all servers you have to "unfortunately" buy an account.