JavaScript animation engine. Anime.js (/ˈæn.ə.meɪ/) is a lightweight JavaScript animation library with a simple, yet powerful API. It works with CSS properties, SVG, DOM attributes and JavaScript Objects.

• Anime.js @ GitHub.

Related contents:

• #126 - 🤖 News Janvier 2026 : Open Code, Qwen Code et un peu de code @ Double Slash :fr:.

Let's build a better web together. We give anyone the power to create, share, and use beautiful custom elements made with CSS and HTML.

htmx gives you access to 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 @ GitHub.

Related contents:

• Please Just Fucking Try HTMX.
• Next.js to htmx — A Real World Example @ htmx.
• Less htmx is More @ Unplanned Obsolescence.
• Bookmarkable by Design: URL-Driven State in HTMX @ Loren Stewart.
• MESH: I tried HTMX, then ditched it @ Alex Moon.
• The fetch()ening @ HTMX.
• Modern Frontend Complexity: essential or accidental? @ I0I.

The Awesome Document Factory.

WeasyPrint is a smart solution helping web developers to create PDF documents. It’s free and open source software that can be easily plugged to your applications and websites and turns simple HTML pages into gorgeous:

WeasyPrint is a smart solution helping web developers to create PDF documents. It turns simple HTML pages into reports, invoices or tickets.

• WeasyPrint @ GitHub.
• PhpWeasyPrint @ GitHub.
• WeasyPrintBundle @ GitHub.
• WeasyPrint for Laravel @ GitHub.

Enhance is a web standards-based HTML framework. It’s designed to provide a dependable foundation for building lightweight, flexible, and future-proof web applications.

Code Playground Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.

A Docker-powered stateless API for PDF files. Gotenberg provides a developer-friendly API to interact with powerful tools like Chromium and LibreOffice for converting numerous document formats (HTML, Markdown, Word, Excel, etc.) into PDF files, and more.

• Gotenberg @ GitHub.
• How to Simply Generate a PDF From HTML in Symfony With WeasyPrint @ Theodo.

Mobility is a super light weight HTML, CSS, and JS mobile UI built on top of Bootstrap for developing mobile applications.

HTML_CodeSniffer is a client-side script that checks HTML source code and detects violations of a defined coding standard. HTML_CodeSniffer is written entirely in JavaScript, does not require any server-side processing and can be extended by developers to enforce custom coding standards by creating your own "sniffs".

Apache Cordova is a platform for building native mobile applications using HTML, CSS and JavaScript

Holmes is stand-alone diagnostic CSS stylesheet that can highlight potentially invalid or erroneous HTML(5) markup by adding one class.

The first thing to point out is that this isn't a kitchen sink project like HTML5 Boilerplate. In fact it's not a template or widget library at all. FE-Patterns is a web stack pattern reference. These patterns are for you to tinker around with. Create your own HTML and use LESS files to style it.