Teddy Hyde is the no compromises, extensible editor for GitHub (with a focus on Jekyll blogging).

Now with secure oAuth login. Supports two-factor authentication and never asks for your password directly.

Edit files directly on GitHub and publish to GitHub pages.

Preview markdown or asciidoc pages with just a swipe.

Intelligent editor knows about YAML Front Matter for Jekyll posts.

Upload images which are resized to a mobile friendly version and a thumbnail.

Add your own extensions to the editor using "Hyde Transformations."

See more at TeddyHyde.com or Blog.TeddyHyde.com.