Sheet: A Ghost Theme
Sheet is a responsive theme for the Ghost blogging platform that I designed specifically for bokstuff.com. You're looking at it right now!
It's built upon the Pure Grids module, which I can wholeheartedly recommend. It introduces very little cruft to your HTML and doesn't make massive assumptions about how your project should look and feel - anyone who has worked with certain other frontend frameworks can appreciate that.
Sheet is free and open source. Check it out on Github!