a converter from Markdown to Re:VIEW. It uses redcarpet.

Markdown with support for pseudocode to flowchart and sequence diagram generation

A simple, beautiful, and embeddable JavaScript Markdown editor.

A Jekyll markdown converter that uses Pandoc (via the pandoc-ruby gem).

Ronn-NG builds manuals in Unix man page and HTML format from Markdown. Ronn-NG is a modern, maintained fork of the original Ronn.

Next generation template language for fans of Haml and Markdown

Rails gem which adds emoji parsing to markdown

Rendered Markdown differ.

A danger plugin for working with bodies of markdown prose.

Migrate a Wordpress export XML file to Middleman-style markdown files

Allows you to write man pages for commands in pure Markdown and convert them to roff using Kramdown.

Presents Markdown slides in your terminal

Massages HTML how you want to: sanitize tags, remove headers and footers; output to html, markdown, or plain text.

A command line interface for generating Markdown table of contents.

Renders markdown via rdoc-rouge, an RDoc and Rouge bridge. Able to use fenced code blocks like github, and includes a default pygments stylesheet.

Upmark has the skills to convert your HTML to Markdown.

Eventually this may be a markdown to PDF, ePUB, MOBI processor. For now it's just something I'm playing around with, so use at your own risk

Gluegun is glues markdown docs from github and pulls together a beautiful docs site.

Pith builds static websites, using markup/template languages including Haml, Sass, ERb, Liquid, Markdown and Textile.

Postview is a simple blogware written in Ruby using the Sinatra DSL for render files written in Markdown.