Can you give an example of such a gem? Normally I just rely on HN to provide me with interesting links, but lately it doesn't seem to give me the same kick it used to.
Gankra's work on a useful rust memory model is both fascinating and useful: https://twitter.com/Gankra_/status/1509335163045650436
This tool to convert low-complexity rust tests to proofs is interesting and something I'm glad I know exists: https://model-checking.github.io/kani-verifier-blog/2022/05/...
I'm using this code I found out about via reddit in a side project, probably less interesting to you though: https://github.com/setzer22/egui_node_graph
(Warning, videos from here on out):
Cool product demo of a futuristic debugger: https://www.hytradboi.com/2022/debugging-by-querying-a-datab...
These people also have a cool demo of splitting a single program across two different computers (frontend and backend webserver in their case). Maybe a bit less convincing than the previous one, but something I intend to watch: https://www.hytradboi.com/2022/uis-are-streaming-dags
These people have some really cool work on automatically solving physics problems (just linking to one of their talks as an example): https://www.youtube.com/watch?v=WHhDgxkiR9c
https://highbrow.se/ (Alternative search engine)
https://cora-pic.com/en (Meme generator)
https://www.mightyapp.com/ (New upcoming cloud browser)
https://ossdatabase.com/ (Database of OSS)
Some of this came from HN, some from elsewhere.
This website lists the first references to some cultural icons on Usenet (for example the first time AIDS was ever discussed, first mention of a new TV cartoon "The Simpsons", etc.) http://www.eightyeightynine.com/culture/80susenet.html
The Public Domain Review, a collection and analysis of interesting stuff in the public domain https://publicdomainreview.org/
David Rumsey Historical Map Collection. I have spent many hours browsing the incredible content here. https://www.davidrumsey.com/
Artvee. Free, high quality art. https://artvee.com/
Restoration Mustang. A high quality long term journal of the restoration of a classic Mustang. Think like an /r/diy project but with way more detail and over a longer time scale. https://restorationmustang.com/
The Renegade Gardener. Highly opinionated no-bullshit gardening advice. I especially love the "Don't Do That" section. https://renegadegardener.com/
Garden Myths. There's a lot of misinformation and old wives' tales in gardening, this website cuts the crap. https://www.gardenmyths.com/
Million Short is a search engine that lets you cut out the million (or 10,000 or 100,000) top results from a search, really good for finding gems. It also has an option for removing e-commerce websites from search which is a godsend. https://millionshort.com/
This one is relevant if you live in New Zealand and love the outdoors: Can I Light a Fire? https://www.checkitsalright.nz/can-i-light-a-fire