What are the best content marketing tools which are too good to be free?

In the content marketing space, marketers invest most in curation and aggregation, content creation, and workflow (Altimeter). As for the greatest challenges facing them today, content marketers identified lack of time/bandwidth to create content, producing enough content variety and volume, measuring content effectiveness and lack of budget as their top concerns, according to a LinkedIn Group Partner survey.

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SMS Marketing for Mobiles phones

Viral marketing ............