Sites like himvis.com

The International Obfuscated C Code Contest site: rules, entries, winners and FAQ for a yearly C programming contest, by Landon Curtis Noll and Simon Cookson

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

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

Ferrous Systems, a Berlin company offering Rust programming consulting, custom solutions and training for teams and embedded developers

Librem One, a subscription bundle of privacy-focused online services and apps from the company Purism, with a Mastodon social server

Asahi Linux is a community project porting Linux to Apple Silicon Macs, distributed via installer and Fedora Asahi Remix

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

The Crystal programming language project's website with language releases, API documentation, news and the core team

Nitter, a free alternative front-end for browsing X (formerly Twitter) without an account, run by its maintainer Wooji

Manjaro, a Linux distribution built on Arch with rolling releases, with news and team pages by its core developers

A news blog on embedded systems, maker boards and single-board computers such as Raspberry Pi and Arduino, run by CNX Software Limited

A French-language project page for Armbian, an open-source Debian and Ubuntu Linux distribution for ARM single-board computers

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

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

django CMS is an open source content management framework built on Django, for enterprise websites and agencies

Alpine Linux, an independent lightweight Linux distribution built on musl libc and busybox, with its release announcements and documentation

Rocket.Chat, an open source team chat and collaboration platform for secure, self-hosted government and enterprise communications

The NetBSD Project's home site for its free, portable Unix-like operating system, with documentation, platform lists, news and downloads

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

A minimalist blogging platform called Mataroa, where users write markdown posts on their own subdomain or domain, with an API and export options

The Slackware Linux Project, a site documenting the Slackware Linux distribution with downloads, installation help, package lists, changelogs, FAQ and a book

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

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

Leanpub, a self-publishing platform where authors sell early-access and in-progress books, including technical titles on software and AI

MyBB is a free, open source forum software project, with its download, documentation and support community hosted on its own site