The original Squeak release is available under APSL2. The APSL2 is listed as a GPL-Incompatible, Free Software License so this means we have a version of Squeak that is Free Software.
“This is a free software license, incompatible with the GNU GPL. We recommend that you not use this license for new software that you write, but it is ok to use and improve the software released under this license. More explanation is available. “