Is there a viewer or other free program(s) that will read a .CWK file?
I couldn't open it with MS Word
The CWK file type is primarily associated with 'ClarisWorks' by FileMaker, Inc.. ClarisWorks has been taken over by FileMaker, Inc.
The FileMaker Pro program version 7 or lower might be able to open these files. If you can find an old copy of AppleWorks it also should be able to open them.