@belongbot4000 is an open source Twitter bot that scrapes belong.io (here’s a bit about the site, credits go to Andy Baio) and looks for new tweets to retweet.
Due to Twitter’s Automation rules creating a bit of a gray area when it comes to automated retweets (@belongbot4000 has been suspended in the past), as a way to avoid bothering people with retweet notifications I made the account private and you need to wait to be accepted when you follow it.