1.thephpleague / commonmarkHighly-extensible PHP Markdown parser which fully supports the CommonMark and GFM specs.phpcommonmarkmarkdowngithub-flavored-markdowngfmhacktoberfestPHPBSD-3-CLAUSE3K total223 forks+3 starsfrom 2,979 · score 1.39
2.Python-Markdown / markdownA Python implementation of John Gruber’s Markdown with Extension support.python-markdownmarkdownmarkdown-parsermarkdown-to-htmlpythonpython3PythonBSD-3-CLAUSE4.3K total929 forks+2 starsfrom 4,255 · score 1.10
3.lepture / mistuneA fast yet powerful Python Markdown parser with renderers and plugins, fully CommonMark compliant.markdownPythonBSD-3-CLAUSE3.1K total344 forks+1 starsfrom 3,080 · score 0.69