Minerva and SMSQ/E, both related to Sinclair QDOS, the original OS for the Sinclair QL. https://youtu.be/yU0ptNyNqcI And EmuTOS, a FOSS recreation of Atari TOS & GEM, which reached v1.0 about 6 months ago. https://youtu.be/eqrM4TE5jTM I knew about the 1st 2, but this video taught me a lot. It's an insular community and most materials are aimed at people who already know about it. I wrote a blog post to explain a bit of the history and context: https://liam-on-linux.livejournal.com/78738.html Found via the m68k.info community: https://m68k.info/#sinclairql:video:SMSQE:mar2021 Which in turn I found when I asked if there were any 16-bit homebrew computers out there and learned of the Kiwi 68K: https://www.ist-schlau.de/ -- Liam Proven ? Profile: https://about.me/liamproven Email: lproven at cix.co.uk ? gMail/gTalk/gHangouts: lproven at gmail.com Twitter/Facebook/LinkedIn/Flickr: lproven ? Skype: liamproven UK: +44 7939-087884 ? ?R (+ WhatsApp/Telegram/Signal): +420 702 829 053