Far McKon points out two more kinds of free besides “Free as in speech” or “Free as in beer”: Dirt or Kittens. Both are often free and that kind of freedom has a special peculiarity. Far explains.
But wait, there's more
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I love this! From now on I will refer to Net::Amazon::AWSSign as “free as in dirt”.
Yeah! I think my wordpress reader is currently free as in kittens but I think it could someday transform into beer. That’s the result of a lot of hard work, turning kittens into beer.