HackerBoards (2014-2018 as Board-DB.org, 2021-present)

The largest online database for Linux single-board computers and industrial modules.

Metrics. Peak userbase: avg. 40.000 hits / month in 2017 (Google Analytics). Current domain authority: 45.
Management. Owned and managed by DeviceGuru Network (Palo Alto, CA) between 2018 and 2022. Re-acquired and rewritten from scratch with M. Braam in 2022 for more stability and features.
Ethics. GDPR-compliant. Zero cookies since 2022. Open data format since 2023.
Press.
According to ARM.com, "a library of single-board computers".
According to GigaZine (Japan), "a convenient service that [...] you can enjoy even just watching it".
According to Hackaday.com, it "makes a fine-grained selection of detailed features significantly easier".
According to someone on Mastodon, "peak efficient web design".

TuxPhones (2019-present)

A website to demistify mobile Linux through resources, news, and tutorials for all levels of expertise.

Sub-Projects. Does My Phone Run Linux?, postmarketOS New Devices Bot, mutter-caster
Metrics. Around 1Mln hits from 2019 to 2021, according to EthicalAds. Current domain authority: 41.
Ethics. Zero cookies and zero trackers since its birth. Direct collaboration with FOSS projects for fair reporting.
Press. According to HMD (a German springer journal), a "very good and clear source of information".

Mirror Hall (2023-present)

A performance-oriented screen streaming app for Linux systems, allowing to use other Linux devices over the network as secondary screens in a peer-to-peer-fashion. First release expected in late 2024.

Linux apps (Gestures, Workflow)

Several Linux apps to expose core functionality in a hassle-free and accessible way

Metrics. Between 50k and 100k downloads in total, est. Flathub and GitLab
Ethics. Fully free, local-first, non-profit, and open-source
Press. Reviewed by OMGUbuntu, The Linux Experience (180k views), UbuntuHandbook, and people on Hacker News (149 pts).

Open-hardware smartwatch

A STM32-based 32-bit smartwatch project designed to be minimal and have long-lasting battery life.

DIY maker projects

I used to design homemade electronics up to around 2018, mostly audio and Hi-Fi stuff, plus an ultra-low-power smartwatch prototype.