Long collection of resources under the cut.
You're right that the internet is smaller than it used to be, but there's still some cool stuff left in the corners. I'd recommend checking checking out Neocities if you haven't--it's an independent web hosting platform like Geocities of the old web, and there are hundreds of interesting and active pages discoverable both through their search function and through web buttons (links attached to small pictures with the title of a website) within the websites themselves. Here are three examples of web buttons you may find in link pages:
Most Neocities websites have link pages or button collections with anywhere from tens to hundreds of these. Don't be afraid to explore!
If you're looking for something more like a search engine, I can point you towards Marginalia. It's not a particularly smart engine, but it's perfectly usable if you've ever been taught to use search engines back when they were mostly run through keywords instead of full sentence comprehension. There's also an "about" and "tips" section on the front page with more information. The algorithm of Marginalia can be filtered by the user to allow, disallow, or require JavaScript depending on your needs, plus there are filters designed specifically to prioritize web 1.0 sites or mostly text-based ones. It is possible to search for modern websites with it, but it can return websites from just about any decade (since the invention of the web, obviously) so long as they contain the information you're looking for. For example, here are some random interesting sites I've found using Marginalia:
Native Languages of the Americas: Native American Cultures
BASIC HTML COMPETENCY IS THE NEW PUNK FOLK EXPLOSION!
Earthbound Text Labs by Bill Eager
The possibilities for discovery are truly endless.
Now you might want to know about directories. These make browsing for websites easier, but require you to read through and judge which ones to visit, as there aren't algorithms ranking the sites besides the whim of whoever coded the directory. Some of them have themes, others don't. Here are two that I've used:
Directories can be harder to come by just by surfing the net, but they aren't impossible to find. Many personal websites have their own directories of interesting sites hidden within them.
Webrings are similar to directories, but are actually more community-based. You have to register your website to be a part of a webring, usually by sending an email to whoever runs it and meeting some kind of entry criteria. For example, my personal website used to be a part of a webring called Sweet Dreams, which was for websites that heavily utilize color palettes and images of cute things, particularly sweets. Webrings will give you access to a widget upon entry that allow visitors and other members to browse between the registered websites in a massive ring, ergo, where the term gets its name. Webrings can have any theme or criteria for entry. If you can make a website about it, you can find a webring for it.
Now, you might be wondering about social media alternatives. I can't offer much, but I can nudge you towards the idea of forums. Here's one I found that could really use some traffic. I also browse a bit on MelonLand forum, which is actually closed right now--it's currently closed on Mondays--but on any other day of the week, you can find a fun community there dedicated to web revival. You can find it through MelonLand's main page. I'd also recommend checking out SpaceHey, which is a MySpace clone that's customizable and easy to use.
I hope this is of some help to you. The internet may feel less magical than it used to be, but that doesn't mean that the spark has completely died out. These types of indie websites need more attention if we ever hope to reverse the damage done to the internet by centralization and corporate interest. People are trying to make the web a cooler place to be, but we're going to have to do the work of finding and interacting with these projects in order to get them off the ground someday.
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