friend_dump.py is a script that will save a specified user's followers to a text file.
auto_follow.py can read in a text file containing twitter screen names and automatically send follow requests to each person within the list
find_locals.py will go through a specified users followers and only save their name to a text file if they are in the specified location, e.g. "London".
purge.py will go through and unfollow all persons that are not following you back.