Sites like siddarthkay.com

Personal portfolio and blog of Felix Nüsse, a developer of Nextcloud apps and Android apps such as Disky

Nitratine, a personal blog and portfolio by Brent, a New Zealand software developer, covering Python tutorials and projects

Tasks.org: documentation and product pages for Tasks, a free open-source Android task management app with CalDAV sync

Fedilab, a free open-source multi-account client for Mastodon, Pleroma, Friendica, Pixelfed and PeerTube, with documentation and related projects

Tusky is a project page and FAQ for Tusky, a lightweight Android client for the Mastodon social network

Gadgetbridge, a free open source Android app for pairing and managing smart watches, bands and other wearable gadgets without vendor apps

The Battle for Wesnoth is an open source, turn-based fantasy strategy video game, with its project's developer documentation and release notes

Libretro, a project and website for the crossplatform application API behind the RetroArch emulator frontend, with news and forums

Volksverpetzer, a German fact-checking blog and app debunking fake news and disinformation, run by its editorial team

Joplin, an open source note-taking app with multimedia notes, web clipping and end-to-end encrypted sync, developed by Laurent

Zulip, an open-source team chat application with threaded async messaging, API documentation and help center, by Zulip developers

Syncthing, an open-source continuous file synchronisation tool, with project donation and foundation information pages

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

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

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

Obsidian, a free note-taking app for private writing and linked notes, with CLI and multilingual pages