<img class="shot2" src="https://techcrunch.com/wp-content/uploads/2011/06/textfreeshot.png" alt="" /><a href="http://www.pinger.com">Pinger's</a> Textfree, the app that lets users send and receive fre
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<em>This guest post was written by Erik Fikkert, Lead Reviewer, <a href="htt