At the moment, I have only the email address regex program (from Chapter 7 and Appendix B), as it's the most substantive bit of code.
There is an optimized version from Appendix A and the unoptimized version discussed in Chapter 7.
DOS users may find these versions (optimized and unoptimized) easier to download -- the Perl is the same, but the lines end with CR/LF, and the URLs endi with ``.txt''.