Link to Dropbox. Write Markdown-formatted text. Use your favorite TextExpander snippets. Do quick research to find reference materials. Lookup or substitute words from Terminology app. Insert quotes and links into your documents. Upload images to CloudApp. Export your writings as Markdown or HTML files. Send them to Evernote, Facebook, Posterous, Tumblr and Twitter. Or use the generated HTML for your blog post. Your choice.
... Meets Awesome Researching Tools
Use the power of 1300+ site-specific search engines to find the materials you need. Enable Ad blocking and Text-only mode to enjoy a reading experience without visual clutters. Access your bookmarks on Delicious, Pinboard and Zootool. Browse your Instapaper unread items. Queue interesting links to view them later. Send content to OmniFocus, Things and The Hit List. Writing Kit is built for researching and looking up stuff.