Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Loofah also includes some HTML sanitizers based on `html5lib`'s safelist, which are a specific application of the general transformation functionality.

Sanitize is an allowlist-based HTML and CSS sanitizer. It removes all HTML and/or CSS from a string except the elements, attributes, and properties you choose to allow.'

A drop-in Jekyll Plugin that provides an asset pipeline for JavaScript, CSS, SASS, SCSS. Based around Sprockets (from Rails) and just as powereful it provides everything you need to manage assets in Jekyll.

Swiss-Army Knife for RDF(a) markup generation

validate-website is a web crawler for checking the markup validity with XML Schema / DTD and not found urls.

metanorma-standoc realises standards following the Metanorma standoc model This gem is in active development.

Helps to evaluate and parse html and css code.

a (very) small library that counts selectors in a CSS file

Filter CSS to produce only @media rules

Rewrite URLs in your 3rd-party CSS files using the asset pipeline.

Rhet Butler is a presentation assistant. Build a slide deck in simple YAML, design it in CSS, run the presentation with your smartphone over Websockets.

sportweb - instant open sports web admin browser command line tool