Markdown Here - Google Chrome, Firefox, and Thunderbird extension that lets you write email in Markdown and render...
WriteWell - Jumpstart your writing with the world's best templates.
Dillinger - joemccann has 95 repositories available. Follow their code on GitHub.
Daily Prompt - Become a better writer
Rapidweaver - A WYSIWYG web editor for mac.
X (Twitter) - Connect with your friends and other fascinating people. Get in-the-moment updates on the things that interest you. And watch events unfold, in real time, from every angle.