Sites like idotj.com

A Go software co-op's collection of XMPP libraries and tools, including the mellium.im/cli and mellium.im/xml packages

A social network instance on Friendica run as a political project, with a support forum, in Italian

Stephen Paul Weber's personal website: blog essays on technology and inequality, software projects, standards work, and his resume

Joey Hess's personal blog on Debian, software development, off-grid living and related technical projects

A personal homepage by Leon Tiekötter in German, hosting public privacy-focused services such as SearXNG, Invidious and Wikiless instances

UBports, a community site on Ubuntu Touch, an open source Linux mobile operating system, with FAQ, apps and jobs

Branchable is a hosting service for Ikiwiki-powered websites, wikis and blogs built on Git

Remmina, an open-source remote desktop client with a news blog and project pages by developer Allan Nordhøy

A generic Lemmy server hosting federated community discussions, with posts and comments from users on many topics

Bugzilla project's website on the open-source bug-tracking software for planning and releasing software, with documentation, history and donation pages

A German personal site by Andreas Itzchak Rehberg on Android books and coaching, plus Oracle database administration tips and services

Gajim, a free desktop chat app for the XMPP messaging protocol, with synchronized chats across devices

A security-focused, compartmentalizing desktop operating system based on Xen, with project news, hardware compatibility list and documentation

The Nim Programming Language site: documentation, downloads, FAQ, blog and donation pages for the statically typed, compiled systems language Nim

postmarketOS is a free, open-source Linux distribution project for phones and other mobile devices, run by the Nura project

OctoPrint, an open source web interface for controlling and monitoring 3D printers, with a blog, help pages and merchandise by Gina Häußge

PHPUnit project website by Sebastian Bergmann covering the PHP testing framework, its releases, documentation, sponsors and community events

Keyoxide, a decentralized tool for creating and verifying online identities using cryptographic keys and profile pages

A documentation site for pytest, the Python testing framework, with a list of talks, books and tutorials about it

PlantUML, an open-source tool that draws UML diagrams from simple text descriptions, with a Q&A forum and German edition

Lemmy is a free, open-source, decentralised discussion platform with threaded comments, run by its communities and self-hosted servers

Mautic is an open source marketing automation software project and product, with its community hub on Slack

A German-language collection of open-source software services run by a private individual, ad-free and funded by donations

Org Mode for GNU Emacs: a plain-text major mode and project site for notes, to-do lists, planning and literate programming

An international community developing free and open-source software, including the Plasma desktop and KDE applications

The official website of Thunderbird, a free open-source desktop and mobile email, calendar and contacts app

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

A free community UNIX shell server, est. 1987, offering shell accounts, email, IRC, gopher, and user home pages

The GNOME project's website, presenting its free and independent desktop computing platform and its community, in English and several other languages

Free open source software for video recording and live streaming, the OBS Studio download and project site

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

The Rust Programming Language project's official site for the Rust systems programming language, with documentation, learning resources and community pages

The Tor Project's website, a nonprofit's home page for the Tor anonymity network, its browser and privacy-protection software

Eleventy, an open-source static site generator for JavaScript developers, with documentation, blog posts and community author pages

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

The official website for the Go open-source programming language, with documentation, tutorials, and the Go Blog

Nextcloud, an open source self-hosted platform for file sharing and online collaboration as a Microsoft 365 alternative

Shields.io is a service that generates concise, consistent badges for GitHub readmes and other web pages

Mastodon, a decentralized, ad-free social network project and its website, with pages in many languages