With Timesheet.js you can easily create simple time and data sheets or timelines using HTML5, JavaScript and CSS3. Yep, it's a Vanilla JS library. Just a few lines JavaScript to generate a beautiful HTML5 layout and some really delicious CSS to be customized by almighty you.

Timesheet.js - JavaScript library for HTML5 & CSS3 time sheets

A beautiful Javascript WYSIWYG HTML rich text editor. High performance and modern design make it easy to use for developers and loved by users.

Froala Editor - A beautifully designed WYSIWYG HTML Editor based on HTML5.

DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMPurify sanitizes HTML and prevents XSS attacks. You can feed DOMPurify with string full of dirty HTML and it will return a string (unless configured otherwise) with clean HTML. DOMPurify will strip out everything that contains dangerous HTML and thereby prevent XSS attacks and other nastiness.

DOMPurify - a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG

A markdown parser and compiler. Built for speed. It is a low-level compiler for parsing markdown without caching or blocking for long periods of time. It works in a browser, on a server, or from a command line interface (CLI). 

Marked - A markdown parser and compiler. Built for speed.

p5.js is a JavaScript library that starts with the original goal of Processing, to make coding accessible for artists, designers, educators, and beginners, and reinterprets this for today's web.Using the original metaphor of a software sketchbook, p5.js has a full set of drawing functionality. However, you're not limited to your drawing canvas, you can think of your whole browser page as your sketch! For this, p5.js has addon libraries that make it easy to interact with other HTML5 objects, including text, input, video, webcam, and sound.

p5 - JS client-side library for creating graphic and interactive experiences, based on the core principles of Processing

noVNC is both a HTML VNC client JavaScript library and an application built on top of that library. noVNC runs well in any modern browser including mobile browsers (iOS and Android). It supports scaling, clipping and resizing the desktop, Local cursor rendering, Clipboard copy/paste, Supported VNC encodings: raw, copyrect, rre, hextile, tight, tightPNG, Touch gestures for emulating common mouse actions.

noVNC: HTML VNC Client Library and Application

Tabler is fully responsive and compatible with all modern browsers. You can create a fully functional interface that users will love! Choose the layouts and components you need and customize them to make your design consistent and eye-catching. Every component has been created with attention to detail to make your interface beautiful.
 
<ul><li>Responsive: With the support for mobile, tablet and desktop displays, it doesn’t matter what device you’re using. Tabler is responsive in all major browsers.
</li><li>Cross Browser: Our theme works perfectly with the latest Chrome, Firefox+, latest Safari, Opera, Edge and mobile browsers. We work hard to to provide continuous support for them.
</li><li>HTML5 &amp; CSS3: We use only modern web technologies, such as HTML5 and CSS3. Our theme includes some subtle CSS3 animations, which will help you attract attention.
</li><li>Clean Code: We followed Bootstrap’s guidelines carefully to make your integration as easy as possible. All code is handwritten and W3C valid.
Demo pages: Tabler features over 20 individual pages using various components, which gives you the freedom to choose and combine. All components can vary in color and styling that you can easily modify using Sass. Sky is the limit!
</li><li>Single Page Application versions: <a href="https://github.com/tabler/tabler-react" target="_blank">Tabler React</a> has React components for Tabler.</li></ul>

Tabler is fully responsive and compatible with all modern browsers. You can create a fully functional interface that users will love! Choose the layouts and components you need and customize them to make your design consistent and eye-catching. Every component has been created with attention to detail to make your interface beautiful.

Tabler -  A premium and open source dashboard template with a responsive and high-quality UI

parse5 provides nearly everything you may need when dealing with HTML. It's the fastest spec-compliant HTML parser for Node to date. It parses HTML the way the latest version of your browser does. It has proven itself reliable in such projects as jsdom, Angular2, Polymer and many more.

parse5 - HTML parsing / serialization toolset for Node.js

A mighty, modern linter that helps you avoid errors and enforce conventions in your styles. It has over 170 built-in rules to catch errors and enforce conventions. It understands modern CSS syntax and features. It is well tested with over 15000 unit tests. Stylelint is unopinionated so that you can customize it to your exact needs.

Stylelint - A mighty, modern linter that helps you avoid errors and enforce conventions in your styles

The Suneditor is a lightweight, flexible, customizable WYSIWYG text editor for your web applications. It has support to Embed images, Videos, Image resizing and rotation, Upload images to the server, Image gallery, Tables and lot more. It has support to use CodeMirror and KaTeX. 

SunEditor - Pure Javascript based WYSIWYG html editor, with no dependencies

A JS library for building WYSIWYG editors for HTML content. It is one of a collection of libraries designed for building tools that make it easier to edit HTML content. It is framework agnostic, The library doesn't use any JavaScript frameworks (no JQuery) but plays nicely with any of them. 

ContentTools - A beautiful & small content editor

HTML is great for declaring static documents, but it falters when we try to use it for declaring dynamic views in web-applications. AngularJS lets you extend HTML vocabulary for your application. The resulting environment is extraordinarily expressive, readable, and quick to develop. It supports model view controller framework. It binds data in an automatic way which updates the view whenever the model changes. Controllers are the behavior behind the DOM elements.

Angularjs - Javascript MVC framework

SeuratJS is a JavaScript library that extends Raphaël and allows for the creation of vivid animations and pixelated artwork using minimal code. It does this by extacting color data from an image of your choice and rebuilding the original with filled graphical primitives in SVG. Seurat makes it extremely easy to alter what primitives are generated (how they look and where they appear) and how they animate.

Seuratjs - A Raphaël plugin for creating beautiful pointilized animations

Htmx allows you to access AJAX, CSS Transitions, WebSockets and Server Sent Events directly in HTML, using attributes, so you can build modern user interfaces with the simplicity and power of hypertext. Htmx is a library that allows you to access modern browser features directly from HTML, rather than using Javascript.

</> Htmx- High power tools for HTML

insane is a lean and configurable whitelist-oriented HTML sanitizer. It works well in browsers, as its footprint size is very small (around ~2kb gzipped). API inspired by sanitize-html (which is around 100kb gzipped).Contrary to similar sanitizers, insane drops the whole tree of descendants for elements that aren't allowed tags.

insane - Lean and configurable whitelist-oriented HTML sanitizer

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