Sites like rubensworks.net

dokieli is a browser-based tool for writing, publishing and annotating articles, created by Sarven Capadisli

Comunica, a knowledge graph querying framework for SPARQL and GraphQL over decentralized RDF data on the Web

Team CoFH, a Minecraft modding team's site with mod downloads, documentation, release updates and history of its founders

Prism Launcher: a free open-source Minecraft launcher for managing multiple game instances, accounts and mods, forked from MultiMC

Peer-reviewed tutorials teaching humanities scholars digital tools and techniques, published in English, Spanish, French and Portuguese editions

Andy Clarke's web design studio and blog in North Wales, with books, templates and t-shirts on web design

TecMint, a Linux how-to blog with tutorials and guides by Ravi, founded in 2012

A community wiki and guide to the IndieWeb movement, promoting personal websites owned and controlled by individuals rather than corporate platforms

Ctrl blog by Daniel Aleksandersen, an Oslo developer's blog of essays, tutorials and technical notes on Windows, Edge and security

F-Droid is an app store and distribution platform for free and open source Android apps

Matrix.org, the home of an open, decentralised network for secure chat and communication, run by the Matrix project

Project Gutenberg, a free online library of about 80,000 public-domain eBooks run by volunteers, founded by Michael Hart

A Spanish and Portuguese documentation site for Socket.IO, a library for real-time bidirectional communication between clients and servers

COIN-OR news blog on open-source operations research software, announcing the COIN-OR Cup awards and foundation board notices

The Pudding is a digital publication of visual essays that explain cultural debates through data and interactive graphics

Servo, an open-source web browser rendering engine written in Rust, with a project blog on its development

Sketchfab, a platform where 3D creators host, share, embed and sell 3D models and AR experiences

Bridgy, a web service that copies social media reactions back onto your own website and cross-posts your site's posts to social networks

Thread Reader App, a tool that unrolls Twitter threads into readable pages, with search, accounts and a premium tier

Gensim, an open-source Python library for topic modelling and semantic vector representation of text, by Radim Řehůřek

The HDF Group, a non-profit company maintaining the HDF5 data format and library for scientific and engineering data management

SWI-Prolog is an open-source Prolog development environment and programming language distribution with documentation and downloads

Larsblog, a blog by Lars Marius Garshol on farmhouse ale, historical brewing, and older topic-maps and XML standards work

A UI framework and documentation site for the Svelte web framework, which compiles components into minimal browser code

Personal website of Sebastián Ramírez, a Colombian software developer, sharing ideas, guides and his open source projects like FastAPI

OpenShot, a free open-source video editing software for Linux, Mac and Windows, with a project homepage and multilingual pages

OpenSCAD is free software for creating solid 3D CAD models by coding, with news and gallery pages

SemiAnalysis is an independent research firm publishing semiconductor and AI industry models, reports and newsletters for businesses and institutional clients

JUnit, a open-source testing framework for Java and the JVM, with documentation, release notes and project information

National University of Kyiv-Mohyla Academy's university website with English pages on its programs, journals and rankings, plus a free online Ukrainian course

Selenium, an open-source browser automation tool for web application testing, documented on its official project website

SciPy, an open source Python library of algorithms for scientific computing, covering optimization, integration, interpolation, statistics and differential equations

Godot Engine, a free open-source 2D and 3D game engine with a project blog and forum, with news by Thaddeus Crews and others

The official home of the Haskell programming language, covering its compiler GHC, build tool Cabal, installer GHCup and community resources

OpenCV, the open-source computer vision library, with its services, training, partner program and blog, run by the OpenCV organisation

JSON Schema is a declarative language and documentation site for annotating and validating the structure and data types of JSON documents

Personal home page of Eric S. Raymond hosting his open-source software, FAQs, essays and the Retrocomputing Museum