MBOT is a Scripts software developed by MBOT. After our trial and test, the software is proved to be official, secure and free. Here is the official description for MBOT:

BS Editor: It's an IRC bot coded in C++ by Tiago Sousa (aka Mirage), released under the GPLv2.
Its main advantage is that several bots can run simultaneously in the same process, making it ideal for shells where the background Processes are limited, but not the connections.

It also spares a lot of resources this way, compared to running many instances of mbot.