Application that connects users to create circular exchanges.
Example:
* User A would like the subject of User B.
* User B does not want anything from A but would like an object from User C
* User C does not want anything from B but would like an object of A.
* A gives its object C which gives its object to B which gives its object to A
The application creates the exchange chains (match), connects users to organize a place and an exchange date.
You pay nothing and send nothing.