I am looking for ctwill's (literate) source code.
I did not find it in CTAN or through Knuth's page.
The links in this previous question (ftp://ftp.cs.stanford.edu/pub/ctwill/ and ftp://labrea.stanford.edu/pub/ctwill/) don't seem to work. (And the same links appear in this cweb repository, so no luck there either.)
Any help is deeply appreciated!
Actually, the repository for cweb binaries contains the source for ctwill.
The reason why this is not immediately apparent is because of how ctwill is generated. Indeed, it is a modified version of cweave, which is generated from the very source files of cweave using the changefile mechanism devised by Knuth.