[@Blizz]
I am assuming it's a program used to help with 'collaborations'.

Collaborations are where two or more people communicate outside of IC, to write a post together. For example: I write a post, and send it to you through Skype, or a PM on this site. Then, you edit it and add in your character's reactions, and send it back to me. We could go back and forth until we think it's good enough, or long enough, or whatever we like.