MDV is a Markdown viewer. It's like Preview, but for Markdown.
MDV comes bundled with a command line tool called mdv that opens Markdown files from the terminal.
To use it, put this folder in your PATH:
/Applications/MDV.app/Contents/bin
For example, if you use zsh, put the following in .zprofile:
export PATH="/Applications/MDV.app/Contents/bin:$PATH"
Alternatively, you can symlink it:
$ cd /usr/local/bin
$ ln -sf /Applications/MDV.app/Contents/bin/mdv .
It takes zero or more Markdown files as arguments:
$ mdv --help
Usage: mdv [file ...]
$ mdv README.md
MDV uses cmark-gfm and highlight.js under the hood.