An elegant, structured XHTML/XML templating engine. Comes with Sass, a similar CSS templating engine. Haml (HTML Abstraction Markup Language) is a layer on top of XHTML or XML that’s designed to express the structure of XHTML or XML documents in a non-repetitive, elegant, easy way, using indentation rather than closing tags and allowing Ruby to be embedded with ease. It was originally envisioned as a plugin for Ruby on Rails, but it can function as a stand-alone templating engine.
Homepage: http://haml.hamptoncatlin.com/