The SqueakEasy project files are distributed under one of three licenses, 
  depending upon the file: the GNU General Public License version 2 and the GNU
  Lesser General Public License version 2.1, and the GNU Free Documentation License
  version 1.1.  Each file will be appropriately marked so that you know
  explicity under which license it falls.

You should have received three additional files with this project that contain
  the full text of the three licenses:
 
     FDL-1.1  GNU Free Documentation License version 1.1
     GPL-2    GNU General Public License version 2.0
     LGPL-2.1 GNU Lesser General Public License 2.1

If these licenses are not amenable to you, please contact the current
  maintainer (or maintainers, if there are more than one) of the SqueakEasy
  project to see if he/she/it/they will license you a copy under a different
  license.  Please note that they are under no such obligation, and indeed
  might have other obligations which conflict with offering the software under
  another licensing scheme (e.g. offering one version for-pay).