Facebook-research is a project mainly written in Python, it's free.
Facebook Research with Support Vector Machines
Facebook Research Application
This is a Python-based Facebook application made to test the ability of support vector machines to predict the importance of a particular Facebook post to a given user.
The application takes a user's previous posts, comments, etc. as well as that of their friends, trains a support vector machine with the retrieved data, and then predicts the importance of a new set of posts.