| > licensed with attribution but most free software is not Let's see: 3BSD: Redistributions in [source/binary] form must [retain/reproduce] the above copyright notice [...] MIT: The above copyright notice [...] shall be included in all copies [...] ASL: You must retain [...] all copyright, patent, trademark, and attribution notices MPL: You may not remove or alter the substance of any license notices (including copyright notices, patent notices, disclaimers of warranty, or limitations of liability) The above sounds like attribution to me. And here's for the elephant in the room: GPLv3: Not required by default (merely requires an appropriate copyright notice to make the license actually enforceable), but (7.) Additional Terms may supplement the basic terms (especially for but not limited to additional material such as art). GPL is deemed compatible with BSD so there's no problem in adding such a clause, even if it is free form. Even if not required, I guess it is customary to do so anyway. |