Artistic License

The current Artistic License, version 2.0 is a free software license. It is compatible with the GPL and is the license used on the standard distribution of Perl.

1.0
The older 1.0 license is approved as free by Debian and OSI, but FSF considers it vague and not a free software license. Libregamewiki do not accept games with this license.

Clarified Artistic License
This one is considered free by the FSF, but it is not identical to 2.0. Libregamewiki accept games with this license.