FEXBots
FEXBots, aka FEX is a bot service for xat.com. They have been trusted from xat and have become an official bot service since 2012. They are the fastest and most secure bots on xat. They also have the most commands out of any other bot services and are the most customizable.
I can't imagine having a chat without a FEXBot. It would be so plain and boring because FEXBots bring so much entertainment and moderate the chat.