Ruby on Rails
:gem: A fast, open source text processor and publishing toolchain, written in Ruby, for converting AsciiDoc content to HTML 5, DocBook 5, and other formats.
Preflight for HTML email
Free, open source mental health communication web app to share experiences with loved ones
Test your rendered HTML files to make sure they're accurate.
Making HTML emails comfortable for the Ruby rockstars
Ruby library for HTML/XML transformation and sanitization
RDoc produces HTML and online documentation for Ruby projects.
Nice code coverage reporting without hassle
π± Reactive views for the HTML+ERB you already have.