Beerware
https://en.wikipedia.org/wiki/BeerwareShould the user of the code consider the software useful, they are encouraged to buy the author a beer "in return" if they ever meet.
Not to be confused with "free as in beer" software
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Should the user of the code consider the software useful, they are encouraged to buy the author a beer "in return" if they ever meet.
Not to be confused with "free as in beer" software