Markdown is a text-to-HTML conversion tool for web writers. Markdown allows you to write using an easy-to-read, easy-to-write plain text format, then convert it to structurally valid XHTML (or HTML).
License: Open Source
Markdown is a lightweight markup language primarily used for formatting text, while Marked is a Markdown previewer that offers more advanced features and customization options. Users looking for simplicity may prefer Markdown, while those needing speed and advanced capabilities may opt for Marked.