> GPL is also acceptable for stand-alone programs if you want to enforce openness, but never for libraries. There's the option of using LGPL for libraries. Tha

> GPL is also acceptable for stand-alone programs if you want to enforce openness, but never for libraries. There's the option of using LGPL for libraries. That way, users of the library aren't required to be open source, but they are required to keep modifications of the library open source if distributed.