If you have Multimarkdown installed or have been using other Markdown editors, you’re like to find scripts here
/usr/local/bin
with names such as
markdown
mm2gv
mmd
mmd2all
mmd2odf
mmd2opml
mmd2pdf
mmd2rtf
mmd2tex
multimarkdown
BTW, scripts do not have do be markdown parsers. You can use LaTex or similar parsers. I’m not sure pandoc would work, but you can try it too.