Utx_static_pages is a project mainly written in Ruby, it's free.
Static Pages is a Rails 2.3 Engine App which allows to have instant static pages added to the admin.
The pages are loaded with a permalink and multiple locales are avaialable.
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There are a few requirements for this plugin to work:
The project must use devise (or the pages controller needs to be changed)
The project requires to use nifty_layout for the title helpers to work
RedCloth is required for the content
The migration must be manually copied from the plugin into the application