Acts_as_comic_engine is a project mainly written in RUBY and JAVASCRIPT, it's free.
Ruby on Rails based webcomic engine
acts_as_comic_engine
This is designed to be a comic engine that works with amazon s3 filehosting and support for a password protected admin panel for page uploads. The intent is to provide a straightforward way to run webcomics off Ruby on Rails.
Up to now I've run a custom them on a Wordpress based site with PHP. The natural extension for me is to develop a Rails equivalent of my existing project.