Permissive (like BSD) and copyleft (like GPL) are the most common terms in use. BSD and GPL are both free, libre and open. >Totally up to you! In the context

Permissive (like BSD) and copyleft (like GPL) are the most common terms in use. BSD and GPL are both free, libre and open. >Totally up to you! In the context of Haskell projects though, I really, really want to see Haskell businesses succeed as well as the open Haskell ecosystem. There's nothing about the GPL (or other copyleft licenses) that makes them incompatible with business.