Basically, I want to be able to automatically build following/follower networks for individual Twitter users up to a distance of X away from the individual in question. I know NodeXL can do this quite easily, but I don't have MS Office, nor do I have any desire to pay for it just to use this one feature of NodeXL. Is there an alternative? I've used Netlytic but that's based on regular search strings and I don't know of any search string that will accomplish this task. I've looked at other sites, but I haven't found anything. I also know that there's a Gephi addon that allows you to collect Twitter data for building networks, but I haven't been able to get it to work for anything more than simply collecting tweets from specified individuals.