Which free Minecraft hack is best?

I've been hacking a lot in Minecraft lately and wanted to know which client is the best

The self-written.

The Spitz hack.

Why hack? That's stupid and makes the game broken.
Your real game skill will then no longer evolve, but rather degenerate.
Also, it does not make the other players happy. Being banned is not great either.
Have fun playing and programming something useful, like an app, a website or some highly complex xD algorithm