Liaison is a fancier sounding name for a middleman. Liaison is also a heavily opinionated Middleman project (see: https://middlemanapp.com) which is setup w/ HAML and Sass (instead of ERB & Less), and preconfigured with the Bootstrap framework, Font-Awesome and GitHub Octicons for icons, Kramdown for rendering markdown content, and Rouge syntax hightlighting for all of your code highlighting needs.