I have been playing with Jekyll, a static site generator, on and off for a couple of years. I really like the direct control you have, writing posts and pages in Markdown, Sass-aware stylesheet development, the ease of developing templates.
Recently, I came across a somewhat recent project: Jekyll Admin. While I still love creating and managing content and templates within Sublime Text or with vim, it’s nice to have a UI that gives me access to create/edit/delete Posts & Pages as well as manage static, data and config files.
Additionally, the opportunity to add/edit/delete metadata fields makes Jekyll Admin particularly great. As of this writing, I am using a number of metadata fields for header images, attribution and creative commons links. The UI makes it very easy to manage.