They also include localization files for MacAMP (If you're still running MacOS 9 and need a lightweight MP3 player), as well as notes and files from an OS History project I had started compiling in the early 2000s but gave up by 2010.
All of these are available freely under Creative Commons, even though the downloads themselves may not state this.
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.