MARKTerm renders Markdown for three different outputs, each with
its own command:

- markterm: styled terminal output with syntax-highlighted code
  blocks, automatic light/dark theme detection, base16 themes,
  clickable links and inline images where the terminal supports
  them.
- markmark: Markdown back to Markdown, to reformat or normalise
  documents.
- markpdf: Markdown or HTML to PDF, laid out with litehtml and
  written with libharu, including embedded CID fonts and remote
  images.

The TEXMATH option (on by default) renders LaTeX math blocks as
Unicode text art through libtexprintf, which is GPLv3.