Minebot

Minebot is a mod for minecraft that takes control of the player and automatically does tasks for you. It simulates keyboard and mouse input to interact with the word.

Minebot is written to be played on normal minecraft in survival mode. Creative mode and some mods partially work but are not targeted.

The bot is controlled by giving it commands using the chat line. For advanced uses, it can be controlled using simple scripts or the Javascript API.

Have a look at the Getting Started Wiki Page to see how to use the bot.

The newest version is there:

https://github.com/michaelzangl/minebot/releases