This is a Metasploit-style module system specifically for XXE exploit code. This allows a common interface, including the ability to automate downloads of numerous files, or automatically walk the directory structure if the vulnerable system is based on Java.
You can download it from the following link: https://packetstormsecurity.com/files/download/127115/otori-0.2.tar.gz
Source: https://packetstormsecurity.com/files/127115/Otori-0.2.html