This To That tells you what type of adhesive to use to glue different materials together. It's handy for Halloween when suddenly you need to figure out how to attach vinyl to styrofoam or something (hot glue)
https://ninite.com/ - Easiest way to set up a new Windows PC with the latest common applications without toolbars, prompts, or anything like that. Not necessarily obscure but I like to peddle it.
https://www.printablepaper.net/ - Need a check register? Graph paper? Lined paper? College ruled or wide ruled? Dot paper? Calendars? If it's on paper, chances are you can find it and print it here.
Want to know something about published science fiction or fantasy? Forget Goodreads or Wikipedia bibliographies, the ISFDB has ridiculously comprehensive details about every book, author or magazine I've looked up.
An email service that uses addresses like yourname-appname@port87.com to organize all your email into a folder for every app/service.
You can also make these addresses screen senders before their email goes through, for something like yourname-friends@port87.com.
You can mark them as public and they’ll be included in a list if someone emails the bare address (yourname@port87.com), so you can share your bare address all over the internet without getting spam.
(Full disclosure: I created and operate this service.)
Idk how obscure it is but Paul’s Online Math Notes https://tutorial.math.lamar.edu/ are the best math guide I’ve ever had. It got me through an engineering degree
http://remove.bg is a website that makes removing backgrounds from photos or artwork a lot easier! I think it uses A.I or something, it's been super helpful for me a couple
times.
privacyguides.org has a ton of awesome tips on how to navigate technology these days without becoming a walking data point for everything you have contact with.
The first and foremost thing that comes to mind is the wayback machine. It lets you archive and immortalize any moment in a website's history.
Though I may be cheating a little here because it's actually a toolbar, another obscure, highly useful "website" is the Hypothesis toolbar. It adds a comment section to any webpage merely by existing.
It's basically an interactive Python session using a Python interpreter compiled to WebAssembly and which then runs locally on your device via your browser without having to install anything on your end.
It's very cool to check some calculation out very quickly on your phone or tablet.
Taking a chemistry class? ptable.com is the best Periodic Table site by far, packed with info and ways to visualize the relationships between elements.
Interested in what class doesn't teach you about the elements? Theodore Gray's Wooden Periodic Table Table website has a ton of very high resolution shots of the best samples you'll find, along with detailed backstory on where each one came from or how it was used.
No idea if this is obscure or not, but for creating diagrams I've found draw.io a very useful free website/tool (there's an offline version).
The ability to hide the entire model inside the png is really neat. You can upload the png in a wiki and later on just import it to alter it again.
Radio Garden - Listen to hundreds of radios around the globe (with a pretty interface to find your favorite radio station). Having lived in several countries, I have a list of radio stations I grew to like, and now I can have easy access to all of them.
I've been using https://squoosh.app/ a lot recently. Found it in a similar thread
EDIT: It is an image compression site where the images never leave your device. Or so the privacy policy says anyway. It took some tweaking, but i've had some images with an 80%+ size reducrion with almost no perceivable quality loss.
Microwave Watt?? Converts cooking instructions to whatever your actual microwave is (mine’s a shitty 700w beast so I have to add about 50% cooking time to most things).
http://www.microwavewatt.com/
If you have a tendency to accidentally X out of your entire browser with all its tabs by an errant flick of the mouse, then this site as one of your tabs (need to click one for Chrome, as it notes) will have a popup asking if you're sure you want to close everything, letting you prevent that.
For all my fellow mechanical engineers out there, Custom Parts is an incredible tool for estimating tooling and production costs for injection molding, die casting, stamping, you name it. For runs all the way from 50 parts to 2 million I've found the estimates there to be consistently within 10% of the quotes we've gotten from suppliers
Edit: Corrected link, that's what I get for going off memory lol
The only way I see to fix this issue is to use a different search engine which doesn't rely on google or bing. I only know of one which is brave but please let me know if there are any others.
The reason I say this is because it will increase competition and is better for users.