AI

AI, or Artificial Intelligence are computer scripts/code that can control a civilization in 0 A.D., allowing you to play a game without the need of finding someone to play against.

qBot
qBot is the default AI used 0 A.D. It's the more advanced of the two mainline AIs.

JuBot
Originally a marginally improved version of TestBot (a proof of concept AI that performed no actions) JuBot was the first real AI created for 0 A.D. It is no longer actively developed and is kept on for use as the easy AI.

Marilyn
Development Thread

Marilyn is a fork of qBot developed by wraitii. As of August 2012, Marilyn has been abandoned and it's creator has decided to merge it's improvements into qBot.

RootBot
Development Thread

RootBot was a bot created by a group of students for a class project. It is no longer developed, and the last "official" version doesn't work on the latest version of 0 AD. Gudo on the forums has since done one bugfix release here.

Split Bot
Development Thread

Created by lexa, Split Bot is no longer under active development and no longer works with the latest versions of 0 A.D. SplitBot code is hosted here on Github.

From the Wildfire Wiki