CommonMark.jl is a markdown parser which is fully compliant with the CommonMark 0.29 spec. In addition to the standard features it includes several extensions such as inline and display maths, admonitions, footnotes, and tables. Additional extensions are planned, as well as a public interface for 3rd-party extensions.
The package is registered in General so can be installed with
pkg> add CommonMark
Please report any problems you come across in the issue tracker. Saying that, the package does pass all tests required by the CommonMark spec and so can be considered usable in the regard. Feature requests are welcome as well.
In comparison to the built-in markdown parser shipped with Julia this package provides inline HTML, correct handling of lazy paragraph continuations, and link reference definitions. There may be others as well, but those are the main ones.