Twitter is very powerful tool for promotion and searching for customers. Twitter follow/unfollow software perform bulk follow and unfollow operations.
For efficiently promotion in Twitter you need a lot of followers. Manual search and following takes too much time! So you need bot which will perform two operations: follow by people which found by keywords and unfollow people which do not follow you.
Solution is our bot. Software was built on C# using WebBrowser control. This aproach give us ability to simulate human activity and easy process websites. It works perfect and we use it sometimes for searching new friends in Twitter.