Text plus is a free App that provides a free phone number and unlimited chatting with strangers.  

Users can send private messages and send "pics" to each other.

Users can create "communities" and invite up to 100 people to their community. 

Teachers could use this App to connect with other teachers and borrow ideas.

A few years ago, textPlus announced its second anniversary and 10
billion messages
 sent within the network. June, 2011

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