This project is a Salesforce APEX class that implements an interface into the Defensio.com API, which can be used to filter objects that are created in Salesforce.
Examples would be if you utilize the Salesforce Email Services, and you want to have a bit more control over what ends up being created as objects for your users.
This project includes all aspects of a full spam filter implementation. All you need to do is incorporate the Defensio classes into your own code, customize some implmentation specific things (like Defensio API key), and you're good to go.
Note, that Defensio works best when you retrain mistakes, so the more you interact with it, the better it will work for you.