TwtBizCard is for sale. Interested?

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TwtBizCard lets you exchange contact info on Twitter using a #hashtag. See a demo here.

Support & Feedback

Hi there, my name is Felipe Coimbra. I'm the founder of 63 Squares. TwtBizCard is one of our products. Thinking about using our services? Have general questions? I'd love to hear from you! You can always email me directly at

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