The source code for the Newspeak system consists of code developed as part of the Newspeak project at Cadence Design Systems, of code that constitutes the underlying Squeak Smalltalk system, and of other contributions. Code developed by Cadence is licensed under the Apache 2.0 license, and all such files or classes bear the following copyright and licensing notice:
Copyright 2008 Cadence Design Systems, Inc. Licensed under the Apache License, Version 2.0 (the ''License''); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
Code that is part of Squeak is licensed under the Squeak license:
Licensed under the Squeak License (the ''License''); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.squeak.org/SqueakLicense/
(note that in a Squeak or Newspeak image, Squeak classes do not usually come with an explicit copyright and license)
Code that has been individually contributed will have its copyright and licensing terms described in the class comment in the image, and in the individual source files. The preferred license for individual contributions going forward is the MIT license.