r9k_b is a Twitter Bot designed to find "tweetable" comments from 4chan's iconic /r9k/ board and post them to your Twitter account. You can view it in action here.
It is run by a single Groovy script with a configurable
.properties file and can be easily modified to support any 4chan board.
To learn how to use r9k_b and how and why it was developed, visit this page.