Owners of e-commerce businesses can benefit from free Twitter social media marketing tools for social media marketing. For example, TwitterMail is a free service that can be a real time-saver. It allows your to send an email that will be posted as a tweet. You can post longer messages and also post images to Twitpic via email. TwitScoop is another free tool that lets you both send and receive Tweets, as well as find new Twitter friends instantly, without ever reloading the page.
It also allows you to search and follow to keep up with what's happening on Twitter in real time. Twitter Grader is a free service that allows entrepreneurs to grade the power of their Twitter profile as compared to millions of other profiles that have also been graded. This can give you a better idea of how influential, or not, you are on Twitter.