Sites like cssportal.com

A free collection of over 100 online web tools for webmasters, including favicon, gradient, image and CSS generators

Animista is an online tool for generating and downloading on-demand CSS animations for web elements, such as boxes, buttons and text

A CSS drawing project by Lynn Fisher, where each illustration is a single div with pseudo-elements

A collection of free online tools for text, image and PDF tasks, gathered in one toolbox by 10015 Tools

Can I use..., a reference site of browser support tables for web features such as HTML5, CSS3 and JavaScript

PostCSS, a JavaScript tool documentation site for transforming CSS with plugins such as Autoprefixer and its API reference

A Japanese online book, JavaScript Primer, teaching modern JavaScript from ECMAScript 2015 onward, maintained by its community contributors

A catalogue of free downloadable programming reference books, such as C, R, CSS and Git, titled "Notes for Professionals

A free website template catalogue and design blog from StyleShout offering modern responsive HTML templates with a design resources blog

Prettier, an opinionated code formatter for JavaScript, CSS, Markdown and other languages, with editor and CI integrations

Learning Lab, a blog on learning a new topic each month alongside a day job, with resources on programming, Web3 and more

Iconoir, a free open-source library of SVG, font and React icons for designers and developers, with a changelog and contribution guide

OddBird's website covers its open-source CSS tools, such as the Susy grid library, with sponsorship and development news from the studio

Portfolio of web developer Jorge Moreno, Moro, showcasing browser extensions, small web tools and product experiments

WinSCP, a free open-source SFTP and FTP client application for Windows file transfers between local and remote computers

Vite, a frontend build tool and development server for modern web projects, documented by its core team

A cross-platform C library and command-line tools for communicating with iOS devices, developed as free open-source software

Aleksandr Hovhannisyan's personal website: a software developer's blog on programming, life and other topics, with notes, CSS art and guitar covers

The Open Source Geospatial Foundation website, a nonprofit hub supporting geospatial open source software projects, their community, events and governance

Blakadder's blog of smart home DIY guides and gadget reviews, covering Tasmota, Zigbee, ESPHome and Home Assistant hardware

A French telecom company's website for Free: internet and mobile plans, Freebox boxes, store locations, and subscription management

Medoo, a lightweight single-file PHP database framework for SQL queries, data mapping and prepared statements

MelonLand Project, an online arts community celebrating homepages, virtual worlds and early web culture, run as a web project

A React component library company offering free Material UI components and MUI X advanced data tools for building web interfaces

Kilian Valkhof's personal site on front-end development, UX design and his software projects, with talks and writing

Will Stone's personal blog and portfolio on TypeScript, JavaScript tooling, developer experience and macOS tips

A personal website and digital garden by Adam Greenough, a freelance web designer and developer, with essays and online fidget toys

HoHli Projects is a personal portfolio of web services, open-source libraries, blogs, a photo blog and an AI novel by a developer

PSDDude is a blog of Photoshop, Canva and PowerPoint text tutorials, plus emoji, kaomoji and online tool resources

A free online tool that converts text between upper case and lower case, with no need to retype

BootstrapVue is a library of Bootstrap v4 components and grid styles for Vue.js v2, with documentation and an online playground

Mastershot, a free in-browser toolkit for compressing, trimming and converting video, image and audio files, by Jacob Beckerman

3v4l.org is an online PHP shell that runs submitted code across more than 500 PHP versions and shows the output of each

Phoenix Code, a free open source visual code editor for websites, web apps and Markdown, successor to Brackets

A design and development agency that builds web and mobile products, with case studies and services from thoughtbot

Personal blog by Maks Surguy on technology innovation, IoT, design and code, with tutorials, tips and books

Italian-language blog hosting service noblogo.org, offering free ad-free blogs in solidarity with Noblogs, focused on writing over social media

Blog by web standards leader Lea Verou on CSS, web design, icons and open source developer tools