Define your target "Personas" key traits and characteristics: Personapp.io

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Personapp allows you to create and share quick, lightweight personas profiles using a lean, simple text-based framework. For each persona you can define characterizing behaviours, facts and demographics and needs and goals.

100% free.

My comment: Useful, simple-to-use tool to describe and pinpoint the unique characteristics and traits of different types of customers a company needs to communicate with. Recommended.

Try it out now: http://personapp.io