don't use any type of software for social media marketing promotion. If you want to promote your local product you can get help from you local country facebook page admin. You can find out more local admin. For global promotion you can use your facebook friends, twitter followers, facebook fans. On other hard you can use facebook advertising or social media service like me. We giving fans followers at very cheap from any other social media company and make a legit community of them.
I'm the founder of a social media marketing startup Promosity.com. We have a free tool that will allow you create a promotion widget that will allow you to trade a promotional reward such as a PDF, MP3, Image, or Coupon code in exchange for a social media mention. It helps to mention your Promosity deal's url in the tweet or wall post as well to create a nice little viral loop. Like I said, it's free to get started and I'm always around to help if you need some support.