A big list of games. All run on Linux. All are free. (though some free-to-play with payment models between optional and required included).

Really good list, especially considering the strategy and roguelike categories!

An exhaustively detailed (and example-oriented) tutorial on creating template files for voidlinux and making sure that they work.

Even goes into different build systems, contributing your changes upstream and more.

Neat way to manage a (bare-metal) server through the web-browser. Similar to things like webmin or cpanel but completely open and free as far as I can see.

Under the hood it's all based on cli commands (for firewall, logs, network management etc) and especially systemd (everything is invoked through systemd commands initially, can spawn nspawn VMs, manage services, ...). Really neat!

Seems to be the upcoming search engine functioning similarly to Microsoft Academic.

Built to be completely open, fully available as open data, built on open technologies. Very nice.

Presenting a whole new perspective on research discovery services. Intelligent data and quick access to state-of-the-art insights.

Bringing mainly 'insights' but can still be useful as a scholarly query engine.

Very nice display manager that works with wayland and uses simple (often one-liner) scripts to set up new desktop environments/window managers.

This way you can exactly control what happens as a WM is started,
plus it uses PAM as authentication and works with and without systemd.

Semantic Scholar uses groundbreaking AI and engineering to understand the semantics of scientific literature to help Scholars discover relevant research.

Semantic search, tries to imitate Microsoft Academic somewhat. Not completely open but still can be a good resource for academic queries.

Termbin.com is a command line pastebin - easy way to share your terminal output.

The only requirement is netcat!

Another greeter frontend - mimicking ly but apparently written in a more framework agnostic way. (Such that it also works with voidlinux whereas ly does not for example)