metaparsedown
By @Steve George
Adds ability to have meta tags in markdown parsed by erusev/parsedown.
converter
By @Filippo Fadda
A set of classes to translate a text from a HTML to BBcode and from BBCode to Markdown.
smartdown.craft plugin
Bringing the unbridled joy of Markdown Extra and Smartypants to your Craft websites.
easy markdown
By @David Wells
WordPress Plugin to support Github Flavored Markdown + Syntax Highlighting