Markdown Here

Markdown Here is a Chrome extension that allows users to write email in Markdown and render it to HTML before sending. It is especially useful for those who prefer writing emails with code or those who want to avoid formatting buttons. Markdown Here works well with popular email clients such as Gmail, Thunderbird, Yahoo, and Hotmail, as well as platforms like Google Groups, Evernote, Blogger, and Wordpress. The extension is available for Chrome, Firefox, Safari, Opera, and Thunderbird, and is open source with instructions and bug reports available on its Github page.