These are the main Rails projects that I have used to create Twitter prototypes or collect data. All of these projects are hosted on github. Click the links to get further info.
Twitter AWS – A Rails application, that collects tweets from the Twitter stream and sends them to Amazon Mechanical Turk, to get them coded regarding to a predefined set of questions. E.g. What is the sentiment in this tweet? What is this tweet about… etc..
Twitterlyzer – A Rails application that helps me to collect bigger numbers of persons and tweets. It uses parallel requests to the Twitter API, and allows different export fromats.
TwitterZeit – A Rails application, that generates a personalized aggregated newspaper for a Twitter user, using his personal network.