Resources and materials to get yourself started with open source
WebDriver for Firefox
XSS sanitizer for HTML, MathML and SVG
HTML, CSS and JS framework for developing responsive websites and apps
HTML to PDF converter for PHP
Web Extension for saving a copy of complete web page in a single file
Happy DOM is a JavaScript implementation of a web browser
A static analyzer for Java, C, C++, and Objective-C
AdminKit is a free & open-source HTML dashboard & admin template
Allows to easily create, process and reuse HTML forms
Converts CSS selectors to XPath expressions
Tabler is free and open-source HTML Dashboard UI Kit
Lighter, faster browser kernel of blink to integrate HTML UI in apps
Open Source UI Kit built on top of Bootstrap 5 and plain JavaScript
An extensible Markdown Editor, Viewer and Weblog Publisher for Windows
Build GUI for your Python program with JavaScript, HTML, and CSS
A JS-independent, tree-shakeable CSS framework
Status, process, and documents for ECMA-262
PSWriteHTML is PowerShell Module to generate beautiful HTML reports
Ruby HTML and CSS sanitizer
Tool to work with XML and HTML from Ruby
openvpn-monitor is a web based OpenVPN monitor
A collection of all country flags in SVG
PufferPanel is an open source game server management panel
The fastest way to create an HTML app