The granddaddy of HTML tools, with support for modern standards
sq data wrangler
WebDriver for Firefox
Various data formats for the SPDX License List
HTML Loader
The universal markup converter
HTML to PDF converter for PHP
HTML, CSS and JS framework for developing responsive websites and apps
Painless html generation
HTML to React parser
Html menu generator
Html menu generator for Laravel
jq, but for HTML
Powerful rich text editor framework with a modular architecture
Java library for working with real-world HTML
Swift DSL for type-safe, extensible, and transformable HTML documents
Low output latency streaming HTML parser/rewriter with CSS API
Small program rich text component, supports rendering and editing html
An ebook reader application supporting PDF, DjVu, EPUB, FB2, etc.
Template generator for (responsive) emails & email signatures
The next generation Javascript WYSIWYG HTML Editor
AdminKit is a free & open-source HTML dashboard & admin template
iOS/Android pure javascript react-native component
The HTML5 Creation Engine, to create beautiful digital content
Status, process, and documents for ECMA-262