Some personal projects that might be of interest.

DoxyFiltDoxyFilt is a filter written for the doxygen code documentation tool. DoxyFilt enables Perl to be parsed and documented using doxygen.
While DoxyFilt is not under active development or support at this time, some archives are available for download.
MMAgicMMAgic packages are tools I've written over the years. Most date back at least five years and some over a decade, being originally written in C++ or Objective-C. Some of them are interesting or instructive.