Tanmay Sonawane has introduced Write for Mac (http://writeapp.net/mac), a note taking and markdown writing app for Mac OS X. It sports an iOS 7 inspired design with a minimalistic interface.
Write for Mac offers full library management for notes across your Mac and cloud services. All your notes and tags sync with Write for iOS via iCloud or Dropbox. The software will organize and present them in a single place. The app also provides full in-content search and tags
Write for Mac requires Mac OS X 10.8 or later. It costs US$6.99 and is available worldwide through the Mac App Store in the Productivity category.