How to: HTML/XML Parsing
* [HappyMapper](https://github.com/dam5s/happymapper) - Object to XML mapping library, using Nokogiri.
* [HTML::Pipeline](https://github.com/jch/html-pipeline) - HTML processing filters and utilities.
* [Nokogiri](https://nokogiri.org) - An HTML, XML, SAX, and Reader parser with XPath and CSS selector support.
* [Nokolexbor](https://github.com/serpapi/nokolexbor) - High-performance HTML5 parser based on Lexbor, with support for both CSS selectors and XPath.
* [Oga](https://gitlab.com/yorickpeterse/oga) - An XML/HTML parser written in Ruby. Oga does not require system libraries such as libxml, making it easier and faster to install on various platforms.
* [Ox](https://github.com/ohler55/ox) - A fast XML parser and Object marshaller.
* [ROXML](https://github.com/Empact/roxml) - Custom mapping and bidirectional marshalling between Ruby and XML using annotation-style class methods, via Nokogiri or LibXML.