Nanoc

Nanoc is a Ruby-based website compiler that generates static HTML. It supports compiling from various markup languages, including Markdown, Textile, and Haml. It can generate and lay out pages with a consistent look and feel. Nanoc is not a content management system, however it acts somewhat like one.

Advantages of Nanoc
In comparison to other static site generators, Nanoc has a modular architecture.

Differences from traditional content management systems
Although Nanoc sometimes acts as a content management system (CMS), there are many differences.
 * Traditional CMSs must assemble the webpage every time a user requests it. Static HTML pages are pre-assembled and as such do not have to be re-assembled.
 * CMSs run using a server-side language, which exposes the CMS to all the vulnerabilities of the language. Since Nanoc compiles websites to static HTML, the only vulnerabilities are that of the web server itself.
 * The content managed by a CMS can usually be changed at any time through a web interface. Since Nanoc must recompile the website at every change, it is more difficult to modify a website.