I'm the founder of a beautiful Markdown editor. Actually two: Nota - https://nota.md. It's a notes app but a lot of our users use it as a markdown editor. Nota is quite powerful as a markdown editor. It has a lot of smartness built into it. Caret - https://caret.io. We started with this - a beautiful Markdown editor. We aren't implementing new features for it but if you are on Windows or Linux it might be worth... - Source: Hacker News / almost 2 years ago

Just did a bit more searching and found this site that seems to have a product, though I'm not sure if it is actively in production and available. Source: over 2 years ago

Jewelry (ring, necklace, bracelet, earring) seems perfect for physical authentication devices: it's easy to carry, always available, and hard to lose. In the middle ages nobles used signet rings to stamp official documents with their unique personal pattern. In modern times, you can stash a Yubikey in a bulky wristband or put it on a necklace chain, but these are not very stylish. There are a variety of "smart... Source: about 3 years ago