You might also find the Artistic License interesting - http://www.perlfoundation.org/artistic_license_2_0 http://www.perlfoundation.org/artistic_license_2_0 I

You might also find the Artistic License interesting - http://www.perlfoundation.org/artistic_license_2_0 http://www.perlfoundation.org/artistic_license_2_0 It's an interesting balance between freedom and giving back - may be more suited to what you want or may not.