StackEdit
StackEdit is an amazing in-browser editing and content writing tool that helps you deliver great articles. It allows you to preview what your article will look like when it is published. It also runs a spell check on your articles. You can easily integrate StackEdit with Google Drive and Dropbox to save everything you write to the cloud. It also allows you to post directly on multiple social media platforms such as GitHub, Blogger, WordPress, or Tumblr. This makes it a great tool for bloggers and marketers.

Features
- Rich Markdown editor
- WYSIWYG controls
- Smart layout
- Live preview with Scroll Sync
Pros:
- - Edit multiple Markdown documents online or offline
- Save documents as Markdown, HTML or PDF
- Document collaboration with other users and comments through cloud services such as Dropbox and Google Drive
- Synchronize and edit existing Markdown documents from cloud services such as Google Drive, Dropbox apart from your local hard drive
- Post documents on blogging services such as Blogspot, WordPress, Tumblr in one push
- Post documents on GitHub, Google Drive, Dropbox or any SSH server
- Convert HTML to Markdown
- Real-time preview with optional scroll sync
- Markdown Extra/GitHub Flavored Markdown support and Prettify/Highlight.js syntax highlighting
- LaTeX (using MathJax plugin)
- UML diagrams
- Musical Scores (using ABC notation)
- WYSIWYG controls
- Built in spell checker
Cons:
- – Works online as well as offline
– Plugin support
Price:
– No permission management