It can't be easier that this
DatoCMS offers a Middleman plugin that makes it extremely convenient to use content stored in your administrative area to your website. The interface it's similar to Middleman data Files, except that anyone can edit content from a great web interface instead of having to write YAML files:
<!-- source/templates/article.html.erb --><h1><%= dato.article.title %></h1><ul><% dato.article.categories.each do |category| %><li><%= category.name %></li><% end %><ul><div><%= dato.article.content %></div>
Endless image transformations at your disposal
DatoCMS offers best-in-class image processing and image CDN for Middleman. Optimize, resize, crop, rotate and watermark images on-the-fly simply adding custom parameters to the URL of your image. Serve lazy loaded, responsive images in one line of code.