This is NOT abandonware but shareware! I uploaded the German version anyway, since the LemkeSoft website has - for years now - the annoying 'feature' to offer in the German download section the US version! The German file is not to be found on the web through a search engine. I found it by figuring out the download string:
http://www.lemkesoft.org/files/cadintosh/cad611declassic.sit
6.1.1 is the most recent and probably last version for Mac OS 9.
For more information including purchase information go here:
http://www.lemkesoft.com/content/189/cadintosh.html