I personally think that link-building software kind of went out of style years ago -- once people become aware of all the changes that the search engines make to their algorithms in order to improve the user experience. If you want to build links to your site, so you can get traction in the search engines, just do it yourself. Depending on the competition (and the sites you use), it may not take that much. Plus, I always heard that it sets off alarms, so to speak, if you get too many links too quickly.
Joey