For those wondering WTF a .w file is, the core of Typica is written in literate C++. The .w files get processed by ctangle to produce the files the compiler expects and you can optionally run the same stuff through cweave to get a .tex that pdftex can turn into a (currently) 649 page book of source code documentation (which is unfortunately not as nicely typeset as version 1.0 was).