kramdown is yet-another-markdown-parser but fast, pure Ruby, using a strict syntax definition and supporting several common extensions.

A fast, safe and extensible Markdown to (X)HTML parser

A fast, safe, extensible parser for CommonMark. This wraps the comrak Rust crate.

Textile parser for Ruby.

Creole is a lightweight markup language (http://wikicreole.org/).

Fast Implementation of Gruber's Markdown in C

Maruku is a Markdown interpreter in Ruby. It features native export to HTML and PDF (via Latex). The output is really beautiful!

Ruby wrapper for Pandoc

BlueCloth is a Ruby implementation of John Gruber's Markdown[http://daringfireball.net/projects/markdown/], a text-to-HTML conversion tool for web writers. To quote from the project page: Markdown allows you to write using an easy-to-read, easy-to-write plain text format, then convert it to struc...

Class to help with GitHub markdown: * File inclusion * Page TOC

Minidown is a lightweight & fast markdown parser, with complete GFM support.

Fast Markdown implementation

McBean can convert documents from one format to another. McBean currently supports: * HTML * Markdown (a subset) * Textile (a subset) * Creole (a subset) with the help of Loofah, Nokogiri, RDiscount, RedCloth and Creole. "You can't teach a Sneetch." -- Sylvester McMonkey McBean

multi_markdown allows projects to use a wide variety of Markdown libraries, without having to depend on a specific one.

A stupid formatter for piping text through markup processors with a unified API

Small command line tool that reads Markdown files and outputs HTML

A small lib to parse smileys. Use CSS to display them!

A fast, safe and extensible Markdown to (X)HTML parser